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Finding the Fourth Proportional to 1,087.80, 1,499.66 and 737.88

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Solution

The fourth proportional to 1,087.80, 1,499.66 and 737.88 is: 1,017.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.80 : 1,499.66 = 737.88 : x
  2. Step 2: Convert to fraction form
    1,087.80/1,499.66 = 737.88/x
  3. Step 3: Cross multiply
    1,087.80x = 1,499.66 × 737.88
  4. Step 4: Simplify right side
    1,087.80x = 1,106,569.12
  5. Step 5: Solve for x
    x = 1,106,569.12/1,087.80
  6. Step 6: Final answer
    x = 1,017.25

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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.