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Finding the Fourth Proportional to 459,618.80, 689,428.20 and 341,520.80

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Solution

The fourth proportional to 459,618.80, 689,428.20 and 341,520.80 is: 512,281.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,618.80 : 689,428.20 = 341,520.80 : x
  2. Step 2: Convert to fraction form
    459,618.80/689,428.20 = 341,520.80/x
  3. Step 3: Cross multiply
    459,618.80x = 689,428.20 × 341,520.80
  4. Step 4: Simplify right side
    459,618.80x = 235,454,070,406.56
  5. Step 5: Solve for x
    x = 235,454,070,406.56/459,618.80
  6. Step 6: Final answer
    x = 512,281.20

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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.