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Finding the Fourth Proportional to 1,646.76, 2,470.14 and 621.48

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Solution

The fourth proportional to 1,646.76, 2,470.14 and 621.48 is: 932.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,646.76 : 2,470.14 = 621.48 : x
  2. Step 2: Convert to fraction form
    1,646.76/2,470.14 = 621.48/x
  3. Step 3: Cross multiply
    1,646.76x = 2,470.14 × 621.48
  4. Step 4: Simplify right side
    1,646.76x = 1,535,142.61
  5. Step 5: Solve for x
    x = 1,535,142.61/1,646.76
  6. Step 6: Final answer
    x = 932.22

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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.