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Finding the Fourth Proportional to 1,502.12, 2,073.12 and 839.22

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Solution

The fourth proportional to 1,502.12, 2,073.12 and 839.22 is: 1,158.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,502.12 : 2,073.12 = 839.22 : x
  2. Step 2: Convert to fraction form
    1,502.12/2,073.12 = 839.22/x
  3. Step 3: Cross multiply
    1,502.12x = 2,073.12 × 839.22
  4. Step 4: Simplify right side
    1,502.12x = 1,739,803.77
  5. Step 5: Solve for x
    x = 1,739,803.77/1,502.12
  6. Step 6: Final answer
    x = 1,158.23

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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.