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Finding the Fourth Proportional to 839.03, 1,158.04 and 559.28

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Solution

The fourth proportional to 839.03, 1,158.04 and 559.28 is: 771.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.03 : 1,158.04 = 559.28 : x
  2. Step 2: Convert to fraction form
    839.03/1,158.04 = 559.28/x
  3. Step 3: Cross multiply
    839.03x = 1,158.04 × 559.28
  4. Step 4: Simplify right side
    839.03x = 647,670.11
  5. Step 5: Solve for x
    x = 647,670.11/839.03
  6. Step 6: Final answer
    x = 771.92

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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.