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Finding the Fourth Proportional to 579,907.20, 869,860.80 and 402,760.20

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Solution

The fourth proportional to 579,907.20, 869,860.80 and 402,760.20 is: 604,140.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,907.20 : 869,860.80 = 402,760.20 : x
  2. Step 2: Convert to fraction form
    579,907.20/869,860.80 = 402,760.20/x
  3. Step 3: Cross multiply
    579,907.20x = 869,860.80 × 402,760.20
  4. Step 4: Simplify right side
    579,907.20x = 350,345,309,780.16
  5. Step 5: Solve for x
    x = 350,345,309,780.16/579,907.20
  6. Step 6: Final answer
    x = 604,140.30

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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.