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Finding the Fourth Proportional to 520,076.30, 780,114.45 and 319,747.10

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Solution

The fourth proportional to 520,076.30, 780,114.45 and 319,747.10 is: 479,620.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,076.30 : 780,114.45 = 319,747.10 : x
  2. Step 2: Convert to fraction form
    520,076.30/780,114.45 = 319,747.10/x
  3. Step 3: Cross multiply
    520,076.30x = 780,114.45 × 319,747.10
  4. Step 4: Simplify right side
    520,076.30x = 249,439,333,055.60
  5. Step 5: Solve for x
    x = 249,439,333,055.60/520,076.30
  6. Step 6: Final answer
    x = 479,620.65

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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.