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Finding the Fourth Proportional to 930.47, 1,284.29 and 537.72

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Solution

The fourth proportional to 930.47, 1,284.29 and 537.72 is: 742.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.47 : 1,284.29 = 537.72 : x
  2. Step 2: Convert to fraction form
    930.47/1,284.29 = 537.72/x
  3. Step 3: Cross multiply
    930.47x = 1,284.29 × 537.72
  4. Step 4: Simplify right side
    930.47x = 690,585.73
  5. Step 5: Solve for x
    x = 690,585.73/930.47
  6. Step 6: Final answer
    x = 742.19

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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.