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Finding the Fourth Proportional to 488,138.10, 732,207.15 and 207,618.90

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Solution

The fourth proportional to 488,138.10, 732,207.15 and 207,618.90 is: 311,428.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,138.10 : 732,207.15 = 207,618.90 : x
  2. Step 2: Convert to fraction form
    488,138.10/732,207.15 = 207,618.90/x
  3. Step 3: Cross multiply
    488,138.10x = 732,207.15 × 207,618.90
  4. Step 4: Simplify right side
    488,138.10x = 152,020,043,055.14
  5. Step 5: Solve for x
    x = 152,020,043,055.14/488,138.10
  6. Step 6: Final answer
    x = 311,428.35

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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.