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Finding the Fourth Proportional to 514.85, 710.37 and 318.47

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Solution

The fourth proportional to 514.85, 710.37 and 318.47 is: 439.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.85 : 710.37 = 318.47 : x
  2. Step 2: Convert to fraction form
    514.85/710.37 = 318.47/x
  3. Step 3: Cross multiply
    514.85x = 710.37 × 318.47
  4. Step 4: Simplify right side
    514.85x = 226,231.53
  5. Step 5: Solve for x
    x = 226,231.53/514.85
  6. Step 6: Final answer
    x = 439.41

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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.