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Finding the Fourth Proportional to 459,000.80, 688,501.20 and 319,032.80

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Solution

The fourth proportional to 459,000.80, 688,501.20 and 319,032.80 is: 478,549.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,000.80 : 688,501.20 = 319,032.80 : x
  2. Step 2: Convert to fraction form
    459,000.80/688,501.20 = 319,032.80/x
  3. Step 3: Cross multiply
    459,000.80x = 688,501.20 × 319,032.80
  4. Step 4: Simplify right side
    459,000.80x = 219,654,465,639.36
  5. Step 5: Solve for x
    x = 219,654,465,639.36/459,000.80
  6. Step 6: Final answer
    x = 478,549.20

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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.