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Finding the Fourth Proportional to 645,473.73, 890,753.76 and 355,089.33

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Solution

The fourth proportional to 645,473.73, 890,753.76 and 355,089.33 is: 490,023.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,473.73 : 890,753.76 = 355,089.33 : x
  2. Step 2: Convert to fraction form
    645,473.73/890,753.76 = 355,089.33/x
  3. Step 3: Cross multiply
    645,473.73x = 890,753.76 × 355,089.33
  4. Step 4: Simplify right side
    645,473.73x = 316,297,155,833.38
  5. Step 5: Solve for x
    x = 316,297,155,833.38/645,473.73
  6. Step 6: Final answer
    x = 490,023.28

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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.