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Finding the Fourth Proportional to 839.28, 1,158.50 and 603.56

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Solution

The fourth proportional to 839.28, 1,158.50 and 603.56 is: 833.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.28 : 1,158.50 = 603.56 : x
  2. Step 2: Convert to fraction form
    839.28/1,158.50 = 603.56/x
  3. Step 3: Cross multiply
    839.28x = 1,158.50 × 603.56
  4. Step 4: Simplify right side
    839.28x = 699,224.26
  5. Step 5: Solve for x
    x = 699,224.26/839.28
  6. Step 6: Final answer
    x = 833.12

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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.