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Finding the Fourth Proportional to 1,039.72, 1,434.92 and 597.64

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Solution

The fourth proportional to 1,039.72, 1,434.92 and 597.64 is: 824.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.72 : 1,434.92 = 597.64 : x
  2. Step 2: Convert to fraction form
    1,039.72/1,434.92 = 597.64/x
  3. Step 3: Cross multiply
    1,039.72x = 1,434.92 × 597.64
  4. Step 4: Simplify right side
    1,039.72x = 857,565.59
  5. Step 5: Solve for x
    x = 857,565.59/1,039.72
  6. Step 6: Final answer
    x = 824.80

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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.