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Finding the Fourth Proportional to 488,138.60, 732,207.90 and 207,619.40

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Solution

The fourth proportional to 488,138.60, 732,207.90 and 207,619.40 is: 311,429.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,138.60 : 732,207.90 = 207,619.40 : x
  2. Step 2: Convert to fraction form
    488,138.60/732,207.90 = 207,619.40/x
  3. Step 3: Cross multiply
    488,138.60x = 732,207.90 × 207,619.40
  4. Step 4: Simplify right side
    488,138.60x = 152,020,564,873.26
  5. Step 5: Solve for x
    x = 152,020,564,873.26/488,138.60
  6. Step 6: Final answer
    x = 311,429.10

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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.