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Finding the Fourth Proportional to 491,792.80, 738,380.40 and 386,730.40

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Solution

The fourth proportional to 491,792.80, 738,380.40 and 386,730.40 is: 580,639.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,792.80 : 738,380.40 = 386,730.40 : x
  2. Step 2: Convert to fraction form
    491,792.80/738,380.40 = 386,730.40/x
  3. Step 3: Cross multiply
    491,792.80x = 738,380.40 × 386,730.40
  4. Step 4: Simplify right side
    491,792.80x = 285,554,147,444.16
  5. Step 5: Solve for x
    x = 285,554,147,444.16/491,792.80
  6. Step 6: Final answer
    x = 580,639.14

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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.