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Finding the Fourth Proportional to 1,505.13, 2,076.54 and 875.43

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Solution

The fourth proportional to 1,505.13, 2,076.54 and 875.43 is: 1,207.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,505.13 : 2,076.54 = 875.43 : x
  2. Step 2: Convert to fraction form
    1,505.13/2,076.54 = 875.43/x
  3. Step 3: Cross multiply
    1,505.13x = 2,076.54 × 875.43
  4. Step 4: Simplify right side
    1,505.13x = 1,817,868.70
  5. Step 5: Solve for x
    x = 1,817,868.70/1,505.13
  6. Step 6: Final answer
    x = 1,207.78

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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.