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Finding the Fourth Proportional to 837.54, 1,155.78 and 505.77

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Solution

The fourth proportional to 837.54, 1,155.78 and 505.77 is: 697.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.54 : 1,155.78 = 505.77 : x
  2. Step 2: Convert to fraction form
    837.54/1,155.78 = 505.77/x
  3. Step 3: Cross multiply
    837.54x = 1,155.78 × 505.77
  4. Step 4: Simplify right side
    837.54x = 584,558.85
  5. Step 5: Solve for x
    x = 584,558.85/837.54
  6. Step 6: Final answer
    x = 697.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.