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Finding the Fourth Proportional to 1,902.88, 2,625.91 and 1,116.91

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Solution

The fourth proportional to 1,902.88, 2,625.91 and 1,116.91 is: 1,541.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,902.88 : 2,625.91 = 1,116.91 : x
  2. Step 2: Convert to fraction form
    1,902.88/2,625.91 = 1,116.91/x
  3. Step 3: Cross multiply
    1,902.88x = 2,625.91 × 1,116.91
  4. Step 4: Simplify right side
    1,902.88x = 2,932,905.14
  5. Step 5: Solve for x
    x = 2,932,905.14/1,902.88
  6. Step 6: Final answer
    x = 1,541.30

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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.