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Finding the Fourth Proportional to 949.80, 1,424.72 and 401.88

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Solution

The fourth proportional to 949.80, 1,424.72 and 401.88 is: 602.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.80 : 1,424.72 = 401.88 : x
  2. Step 2: Convert to fraction form
    949.80/1,424.72 = 401.88/x
  3. Step 3: Cross multiply
    949.80x = 1,424.72 × 401.88
  4. Step 4: Simplify right side
    949.80x = 572,564.46
  5. Step 5: Solve for x
    x = 572,564.46/949.80
  6. Step 6: Final answer
    x = 602.83

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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.