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Finding the Fourth Proportional to 472.48, 709.32 and 400.79

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Solution

The fourth proportional to 472.48, 709.32 and 400.79 is: 601.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.48 : 709.32 = 400.79 : x
  2. Step 2: Convert to fraction form
    472.48/709.32 = 400.79/x
  3. Step 3: Cross multiply
    472.48x = 709.32 × 400.79
  4. Step 4: Simplify right side
    472.48x = 284,291.64
  5. Step 5: Solve for x
    x = 284,291.64/472.48
  6. Step 6: Final answer
    x = 601.70

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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.