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Finding the Fourth Proportional to 398,562.02, 550,169.10 and 291,978.56

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Solution

The fourth proportional to 398,562.02, 550,169.10 and 291,978.56 is: 403,042.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,562.02 : 550,169.10 = 291,978.56 : x
  2. Step 2: Convert to fraction form
    398,562.02/550,169.10 = 291,978.56/x
  3. Step 3: Cross multiply
    398,562.02x = 550,169.10 × 291,978.56
  4. Step 4: Simplify right side
    398,562.02x = 160,637,581,574.50
  5. Step 5: Solve for x
    x = 160,637,581,574.50/398,562.02
  6. Step 6: Final answer
    x = 403,042.87

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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.