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Finding the Fourth Proportional to 1,507.19, 2,079.80 and 843.95

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Solution

The fourth proportional to 1,507.19, 2,079.80 and 843.95 is: 1,164.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,507.19 : 2,079.80 = 843.95 : x
  2. Step 2: Convert to fraction form
    1,507.19/2,079.80 = 843.95/x
  3. Step 3: Cross multiply
    1,507.19x = 2,079.80 × 843.95
  4. Step 4: Simplify right side
    1,507.19x = 1,755,252.01
  5. Step 5: Solve for x
    x = 1,755,252.01/1,507.19
  6. Step 6: Final answer
    x = 1,164.59

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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.