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Finding the Fourth Proportional to 711.92, 1,068.93 and 615.18

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Solution

The fourth proportional to 711.92, 1,068.93 and 615.18 is: 923.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.92 : 1,068.93 = 615.18 : x
  2. Step 2: Convert to fraction form
    711.92/1,068.93 = 615.18/x
  3. Step 3: Cross multiply
    711.92x = 1,068.93 × 615.18
  4. Step 4: Simplify right side
    711.92x = 657,584.36
  5. Step 5: Solve for x
    x = 657,584.36/711.92
  6. Step 6: Final answer
    x = 923.68

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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.