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Finding the Fourth Proportional to 658,449.90, 908,613.72 and 386,528.85

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Solution

The fourth proportional to 658,449.90, 908,613.72 and 386,528.85 is: 533,382.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,449.90 : 908,613.72 = 386,528.85 : x
  2. Step 2: Convert to fraction form
    658,449.90/908,613.72 = 386,528.85/x
  3. Step 3: Cross multiply
    658,449.90x = 908,613.72 × 386,528.85
  4. Step 4: Simplify right side
    658,449.90x = 351,205,416,285.82
  5. Step 5: Solve for x
    x = 351,205,416,285.82/658,449.90
  6. Step 6: Final answer
    x = 533,382.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.