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Finding the Fourth Proportional to 474.88, 707.36 and 423.04

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Solution

The fourth proportional to 474.88, 707.36 and 423.04 is: 630.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.88 : 707.36 = 423.04 : x
  2. Step 2: Convert to fraction form
    474.88/707.36 = 423.04/x
  3. Step 3: Cross multiply
    474.88x = 707.36 × 423.04
  4. Step 4: Simplify right side
    474.88x = 299,241.57
  5. Step 5: Solve for x
    x = 299,241.57/474.88
  6. Step 6: Final answer
    x = 630.14

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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.