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Finding the Fourth Proportional to 633.66, 877.85 and 618.54

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Solution

The fourth proportional to 633.66, 877.85 and 618.54 is: 856.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.66 : 877.85 = 618.54 : x
  2. Step 2: Convert to fraction form
    633.66/877.85 = 618.54/x
  3. Step 3: Cross multiply
    633.66x = 877.85 × 618.54
  4. Step 4: Simplify right side
    633.66x = 542,985.34
  5. Step 5: Solve for x
    x = 542,985.34/633.66
  6. Step 6: Final answer
    x = 856.90

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.