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Finding the Fourth Proportional to 839.70, 1,159.11 and 752.22

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Solution

The fourth proportional to 839.70, 1,159.11 and 752.22 is: 1,038.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.70 : 1,159.11 = 752.22 : x
  2. Step 2: Convert to fraction form
    839.70/1,159.11 = 752.22/x
  3. Step 3: Cross multiply
    839.70x = 1,159.11 × 752.22
  4. Step 4: Simplify right side
    839.70x = 871,905.72
  5. Step 5: Solve for x
    x = 871,905.72/839.70
  6. Step 6: Final answer
    x = 1,038.35

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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.