Home / 1,087.20-1,500.40-1,038

Finding the Fourth Proportional to 1,087.20, 1,500.40 and 1,038

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Solution

The fourth proportional to 1,087.20, 1,500.40 and 1,038 is: 1,432.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.20 : 1,500.40 = 1,038 : x
  2. Step 2: Convert to fraction form
    1,087.20/1,500.40 = 1,038/x
  3. Step 3: Cross multiply
    1,087.20x = 1,500.40 × 1,038
  4. Step 4: Simplify right side
    1,087.20x = 1,557,415.20
  5. Step 5: Solve for x
    x = 1,557,415.20/1,087.20
  6. Step 6: Final answer
    x = 1,432.50

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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.