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Finding the Fourth Proportional to 641.16, 956.25 and 549

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Solution

The fourth proportional to 641.16, 956.25 and 549 is: 818.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.16 : 956.25 = 549 : x
  2. Step 2: Convert to fraction form
    641.16/956.25 = 549/x
  3. Step 3: Cross multiply
    641.16x = 956.25 × 549
  4. Step 4: Simplify right side
    641.16x = 524,981.25
  5. Step 5: Solve for x
    x = 524,981.25/641.16
  6. Step 6: Final answer
    x = 818.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.