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Finding the Fourth Proportional to 713.41, 1,070.01 and 439.36

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Solution

The fourth proportional to 713.41, 1,070.01 and 439.36 is: 658.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.41 : 1,070.01 = 439.36 : x
  2. Step 2: Convert to fraction form
    713.41/1,070.01 = 439.36/x
  3. Step 3: Cross multiply
    713.41x = 1,070.01 × 439.36
  4. Step 4: Simplify right side
    713.41x = 470,119.59
  5. Step 5: Solve for x
    x = 470,119.59/713.41
  6. Step 6: Final answer
    x = 658.98

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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.