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Finding the Fourth Proportional to 641.53, 961.48 and 554.46

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Solution

The fourth proportional to 641.53, 961.48 and 554.46 is: 830.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.53 : 961.48 = 554.46 : x
  2. Step 2: Convert to fraction form
    641.53/961.48 = 554.46/x
  3. Step 3: Cross multiply
    641.53x = 961.48 × 554.46
  4. Step 4: Simplify right side
    641.53x = 533,102.20
  5. Step 5: Solve for x
    x = 533,102.20/641.53
  6. Step 6: Final answer
    x = 830.99

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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.