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Finding the Fourth Proportional to 442,018.67, 663,491.79 and 391,739.40

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Solution

The fourth proportional to 442,018.67, 663,491.79 and 391,739.40 is: 588,020.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,018.67 : 663,491.79 = 391,739.40 : x
  2. Step 2: Convert to fraction form
    442,018.67/663,491.79 = 391,739.40/x
  3. Step 3: Cross multiply
    442,018.67x = 663,491.79 × 391,739.40
  4. Step 4: Simplify right side
    442,018.67x = 259,915,875,719.53
  5. Step 5: Solve for x
    x = 259,915,875,719.53/442,018.67
  6. Step 6: Final answer
    x = 588,020.14

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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.