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Finding the Fourth Proportional to 950.16, 1,424.76 and 642

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Solution

The fourth proportional to 950.16, 1,424.76 and 642 is: 962.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.16 : 1,424.76 = 642 : x
  2. Step 2: Convert to fraction form
    950.16/1,424.76 = 642/x
  3. Step 3: Cross multiply
    950.16x = 1,424.76 × 642
  4. Step 4: Simplify right side
    950.16x = 914,695.92
  5. Step 5: Solve for x
    x = 914,695.92/950.16
  6. Step 6: Final answer
    x = 962.68

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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.