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Finding the Fourth Proportional to 713.32, 1,068.56 and 439.94

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Solution

The fourth proportional to 713.32, 1,068.56 and 439.94 is: 659.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.32 : 1,068.56 = 439.94 : x
  2. Step 2: Convert to fraction form
    713.32/1,068.56 = 439.94/x
  3. Step 3: Cross multiply
    713.32x = 1,068.56 × 439.94
  4. Step 4: Simplify right side
    713.32x = 470,104.41
  5. Step 5: Solve for x
    x = 470,104.41/713.32
  6. Step 6: Final answer
    x = 659.04

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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.