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Finding the Fourth Proportional to 521.28, 718.62 and 373.66

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Solution

The fourth proportional to 521.28, 718.62 and 373.66 is: 515.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.28 : 718.62 = 373.66 : x
  2. Step 2: Convert to fraction form
    521.28/718.62 = 373.66/x
  3. Step 3: Cross multiply
    521.28x = 718.62 × 373.66
  4. Step 4: Simplify right side
    521.28x = 268,515.96
  5. Step 5: Solve for x
    x = 268,515.96/521.28
  6. Step 6: Final answer
    x = 515.11

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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.