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Finding the Fourth Proportional to 579,456,869.90, 869,185,304.85 and 395,790,860.30

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Solution

The fourth proportional to 579,456,869.90, 869,185,304.85 and 395,790,860.30 is: 593,686,290.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,456,869.90 : 869,185,304.85 = 395,790,860.30 : x
  2. Step 2: Convert to fraction form
    579,456,869.90/869,185,304.85 = 395,790,860.30/x
  3. Step 3: Cross multiply
    579,456,869.90x = 869,185,304.85 × 395,790,860.30
  4. Step 4: Simplify right side
    579,456,869.90x = 344,015,599,566,699,264
  5. Step 5: Solve for x
    x = 344,015,599,566,699,264/579,456,869.90
  6. Step 6: Final answer
    x = 593,686,290.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.