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Finding the Fourth Proportional to 834.05, 1,151.40 and 539.55

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Solution

The fourth proportional to 834.05, 1,151.40 and 539.55 is: 744.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.05 : 1,151.40 = 539.55 : x
  2. Step 2: Convert to fraction form
    834.05/1,151.40 = 539.55/x
  3. Step 3: Cross multiply
    834.05x = 1,151.40 × 539.55
  4. Step 4: Simplify right side
    834.05x = 621,237.87
  5. Step 5: Solve for x
    x = 621,237.87/834.05
  6. Step 6: Final answer
    x = 744.85

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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.