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Finding the Fourth Proportional to 521.48, 718.40 and 423.88

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Solution

The fourth proportional to 521.48, 718.40 and 423.88 is: 583.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.48 : 718.40 = 423.88 : x
  2. Step 2: Convert to fraction form
    521.48/718.40 = 423.88/x
  3. Step 3: Cross multiply
    521.48x = 718.40 × 423.88
  4. Step 4: Simplify right side
    521.48x = 304,515.39
  5. Step 5: Solve for x
    x = 304,515.39/521.48
  6. Step 6: Final answer
    x = 583.94

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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.