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Finding the Fourth Proportional to 474.06, 711.36 and 291.90

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Solution

The fourth proportional to 474.06, 711.36 and 291.90 is: 438.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.06 : 711.36 = 291.90 : x
  2. Step 2: Convert to fraction form
    474.06/711.36 = 291.90/x
  3. Step 3: Cross multiply
    474.06x = 711.36 × 291.90
  4. Step 4: Simplify right side
    474.06x = 207,645.98
  5. Step 5: Solve for x
    x = 207,645.98/474.06
  6. Step 6: Final answer
    x = 438.02

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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.