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Finding the Fourth Proportional to 401.52, 602.47 and 278.31

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Solution

The fourth proportional to 401.52, 602.47 and 278.31 is: 417.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.52 : 602.47 = 278.31 : x
  2. Step 2: Convert to fraction form
    401.52/602.47 = 278.31/x
  3. Step 3: Cross multiply
    401.52x = 602.47 × 278.31
  4. Step 4: Simplify right side
    401.52x = 167,672.73
  5. Step 5: Solve for x
    x = 167,672.73/401.52
  6. Step 6: Final answer
    x = 417.60

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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.