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Finding the Fourth Proportional to 1,646.92, 2,272.96 and 939.02

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Solution

The fourth proportional to 1,646.92, 2,272.96 and 939.02 is: 1,295.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,646.92 : 2,272.96 = 939.02 : x
  2. Step 2: Convert to fraction form
    1,646.92/2,272.96 = 939.02/x
  3. Step 3: Cross multiply
    1,646.92x = 2,272.96 × 939.02
  4. Step 4: Simplify right side
    1,646.92x = 2,134,344.71
  5. Step 5: Solve for x
    x = 2,134,344.71/1,646.92
  6. Step 6: Final answer
    x = 1,295.96

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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.