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Finding the Fourth Proportional to 472.32, 651.65 and 306.75

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Solution

The fourth proportional to 472.32, 651.65 and 306.75 is: 423.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.32 : 651.65 = 306.75 : x
  2. Step 2: Convert to fraction form
    472.32/651.65 = 306.75/x
  3. Step 3: Cross multiply
    472.32x = 651.65 × 306.75
  4. Step 4: Simplify right side
    472.32x = 199,892.10
  5. Step 5: Solve for x
    x = 199,892.10/472.32
  6. Step 6: Final answer
    x = 423.21

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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.