Home / 1,087.30-1,500.55-615.20

Finding the Fourth Proportional to 1,087.30, 1,500.55 and 615.20

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Solution

The fourth proportional to 1,087.30, 1,500.55 and 615.20 is: 849.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.30 : 1,500.55 = 615.20 : x
  2. Step 2: Convert to fraction form
    1,087.30/1,500.55 = 615.20/x
  3. Step 3: Cross multiply
    1,087.30x = 1,500.55 × 615.20
  4. Step 4: Simplify right side
    1,087.30x = 923,138.02
  5. Step 5: Solve for x
    x = 923,138.02/1,087.30
  6. Step 6: Final answer
    x = 849.02

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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.