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Finding the Fourth Proportional to 486,152.20, 727,478.70 and 328,688.20

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Solution

The fourth proportional to 486,152.20, 727,478.70 and 328,688.20 is: 491,849.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,152.20 : 727,478.70 = 328,688.20 : x
  2. Step 2: Convert to fraction form
    486,152.20/727,478.70 = 328,688.20/x
  3. Step 3: Cross multiply
    486,152.20x = 727,478.70 × 328,688.20
  4. Step 4: Simplify right side
    486,152.20x = 239,113,664,441.34
  5. Step 5: Solve for x
    x = 239,113,664,441.34/486,152.20
  6. Step 6: Final answer
    x = 491,849.39

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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.