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Finding the Fourth Proportional to 718.41, 1,079.41 and 458.53

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Solution

The fourth proportional to 718.41, 1,079.41 and 458.53 is: 688.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.41 : 1,079.41 = 458.53 : x
  2. Step 2: Convert to fraction form
    718.41/1,079.41 = 458.53/x
  3. Step 3: Cross multiply
    718.41x = 1,079.41 × 458.53
  4. Step 4: Simplify right side
    718.41x = 494,936.47
  5. Step 5: Solve for x
    x = 494,936.47/718.41
  6. Step 6: Final answer
    x = 688.94

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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.