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Finding the Fourth Proportional to 401.76, 602.40 and 239.48

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Solution

The fourth proportional to 401.76, 602.40 and 239.48 is: 359.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.76 : 602.40 = 239.48 : x
  2. Step 2: Convert to fraction form
    401.76/602.40 = 239.48/x
  3. Step 3: Cross multiply
    401.76x = 602.40 × 239.48
  4. Step 4: Simplify right side
    401.76x = 144,262.75
  5. Step 5: Solve for x
    x = 144,262.75/401.76
  6. Step 6: Final answer
    x = 359.08

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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.