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Finding the Fourth Proportional to 487,138.60, 730,818.60 and 220,975.30

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Solution

The fourth proportional to 487,138.60, 730,818.60 and 220,975.30 is: 331,513.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,138.60 : 730,818.60 = 220,975.30 : x
  2. Step 2: Convert to fraction form
    487,138.60/730,818.60 = 220,975.30/x
  3. Step 3: Cross multiply
    487,138.60x = 730,818.60 × 220,975.30
  4. Step 4: Simplify right side
    487,138.60x = 161,492,859,380.58
  5. Step 5: Solve for x
    x = 161,492,859,380.58/487,138.60
  6. Step 6: Final answer
    x = 331,513.17

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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.