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Finding the Fourth Proportional to 949.48, 1,424.34 and 372.40

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Solution

The fourth proportional to 949.48, 1,424.34 and 372.40 is: 558.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.48 : 1,424.34 = 372.40 : x
  2. Step 2: Convert to fraction form
    949.48/1,424.34 = 372.40/x
  3. Step 3: Cross multiply
    949.48x = 1,424.34 × 372.40
  4. Step 4: Simplify right side
    949.48x = 530,424.22
  5. Step 5: Solve for x
    x = 530,424.22/949.48
  6. Step 6: Final answer
    x = 558.65

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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.