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Finding the Fourth Proportional to 642.24, 962.55 and 554.94

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Solution

The fourth proportional to 642.24, 962.55 and 554.94 is: 831.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.24 : 962.55 = 554.94 : x
  2. Step 2: Convert to fraction form
    642.24/962.55 = 554.94/x
  3. Step 3: Cross multiply
    642.24x = 962.55 × 554.94
  4. Step 4: Simplify right side
    642.24x = 534,157.50
  5. Step 5: Solve for x
    x = 534,157.50/642.24
  6. Step 6: Final answer
    x = 831.71

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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.