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Finding the Fourth Proportional to 459,008.80, 688,513.20 and 319,040.80

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Solution

The fourth proportional to 459,008.80, 688,513.20 and 319,040.80 is: 478,561.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,008.80 : 688,513.20 = 319,040.80 : x
  2. Step 2: Convert to fraction form
    459,008.80/688,513.20 = 319,040.80/x
  3. Step 3: Cross multiply
    459,008.80x = 688,513.20 × 319,040.80
  4. Step 4: Simplify right side
    459,008.80x = 219,663,802,138.56
  5. Step 5: Solve for x
    x = 219,663,802,138.56/459,008.80
  6. Step 6: Final answer
    x = 478,561.20

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Similar ratio
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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.