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Finding the Fourth Proportional to 442,970.80, 664,456.20 and 416,726.80

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Solution

The fourth proportional to 442,970.80, 664,456.20 and 416,726.80 is: 625,090.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,970.80 : 664,456.20 = 416,726.80 : x
  2. Step 2: Convert to fraction form
    442,970.80/664,456.20 = 416,726.80/x
  3. Step 3: Cross multiply
    442,970.80x = 664,456.20 × 416,726.80
  4. Step 4: Simplify right side
    442,970.80x = 276,896,705,966.16
  5. Step 5: Solve for x
    x = 276,896,705,966.16/442,970.80
  6. Step 6: Final answer
    x = 625,090.20

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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.