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Finding the Fourth Proportional to 474.72, 707.28 and 450.24

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Solution

The fourth proportional to 474.72, 707.28 and 450.24 is: 670.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.72 : 707.28 = 450.24 : x
  2. Step 2: Convert to fraction form
    474.72/707.28 = 450.24/x
  3. Step 3: Cross multiply
    474.72x = 707.28 × 450.24
  4. Step 4: Simplify right side
    474.72x = 318,445.75
  5. Step 5: Solve for x
    x = 318,445.75/474.72
  6. Step 6: Final answer
    x = 670.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.