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Finding the Fourth Proportional to 837.50, 1,155.44 and 505.85

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Solution

The fourth proportional to 837.50, 1,155.44 and 505.85 is: 697.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.50 : 1,155.44 = 505.85 : x
  2. Step 2: Convert to fraction form
    837.50/1,155.44 = 505.85/x
  3. Step 3: Cross multiply
    837.50x = 1,155.44 × 505.85
  4. Step 4: Simplify right side
    837.50x = 584,474.81
  5. Step 5: Solve for x
    x = 584,474.81/837.50
  6. Step 6: Final answer
    x = 697.88

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1.5x scale

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.