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Finding the Fourth Proportional to 726.14, 1,088.40 and 314.66

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Solution

The fourth proportional to 726.14, 1,088.40 and 314.66 is: 471.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.14 : 1,088.40 = 314.66 : x
  2. Step 2: Convert to fraction form
    726.14/1,088.40 = 314.66/x
  3. Step 3: Cross multiply
    726.14x = 1,088.40 × 314.66
  4. Step 4: Simplify right side
    726.14x = 342,475.94
  5. Step 5: Solve for x
    x = 342,475.94/726.14
  6. Step 6: Final answer
    x = 471.64

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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.