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Finding the Fourth Proportional to 474.40, 711.56 and 149.77

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Solution

The fourth proportional to 474.40, 711.56 and 149.77 is: 224.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.40 : 711.56 = 149.77 : x
  2. Step 2: Convert to fraction form
    474.40/711.56 = 149.77/x
  3. Step 3: Cross multiply
    474.40x = 711.56 × 149.77
  4. Step 4: Simplify right side
    474.40x = 106,566.03
  5. Step 5: Solve for x
    x = 106,566.03/474.40
  6. Step 6: Final answer
    x = 224.64

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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.