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Finding the Fourth Proportional to 714,281.22, 985,677.12 and 391,996.74

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Solution

The fourth proportional to 714,281.22, 985,677.12 and 391,996.74 is: 540,938.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,281.22 : 985,677.12 = 391,996.74 : x
  2. Step 2: Convert to fraction form
    714,281.22/985,677.12 = 391,996.74/x
  3. Step 3: Cross multiply
    714,281.22x = 985,677.12 × 391,996.74
  4. Step 4: Simplify right side
    714,281.22x = 386,382,217,732.59
  5. Step 5: Solve for x
    x = 386,382,217,732.59/714,281.22
  6. Step 6: Final answer
    x = 540,938.51

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Double scale
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Similar ratio
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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.