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Finding the Fourth Proportional to 1,878.90, 2,592.80 and 1,039.56

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Solution

The fourth proportional to 1,878.90, 2,592.80 and 1,039.56 is: 1,434.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,878.90 : 2,592.80 = 1,039.56 : x
  2. Step 2: Convert to fraction form
    1,878.90/2,592.80 = 1,039.56/x
  3. Step 3: Cross multiply
    1,878.90x = 2,592.80 × 1,039.56
  4. Step 4: Simplify right side
    1,878.90x = 2,695,371.17
  5. Step 5: Solve for x
    x = 2,695,371.17/1,878.90
  6. Step 6: Final answer
    x = 1,434.55

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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.