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Finding the Fourth Proportional to 719,306.78, 992,572.63 and 396,996.10

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Solution

The fourth proportional to 719,306.78, 992,572.63 and 396,996.10 is: 547,815.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,306.78 : 992,572.63 = 396,996.10 : x
  2. Step 2: Convert to fraction form
    719,306.78/992,572.63 = 396,996.10/x
  3. Step 3: Cross multiply
    719,306.78x = 992,572.63 × 396,996.10
  4. Step 4: Simplify right side
    719,306.78x = 394,047,459,602.82
  5. Step 5: Solve for x
    x = 394,047,459,602.82/719,306.78
  6. Step 6: Final answer
    x = 547,815.58

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Double scale
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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.