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Finding the Fourth Proportional to 487,065.40, 730,598.10 and 319,103.80

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Solution

The fourth proportional to 487,065.40, 730,598.10 and 319,103.80 is: 478,655.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,065.40 : 730,598.10 = 319,103.80 : x
  2. Step 2: Convert to fraction form
    487,065.40/730,598.10 = 319,103.80/x
  3. Step 3: Cross multiply
    487,065.40x = 730,598.10 × 319,103.80
  4. Step 4: Simplify right side
    487,065.40x = 233,136,629,982.78
  5. Step 5: Solve for x
    x = 233,136,629,982.78/487,065.40
  6. Step 6: Final answer
    x = 478,655.70

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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.