Home / 1,114.20-1,537.32-720.75

Finding the Fourth Proportional to 1,114.20, 1,537.32 and 720.75

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Solution

The fourth proportional to 1,114.20, 1,537.32 and 720.75 is: 994.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.20 : 1,537.32 = 720.75 : x
  2. Step 2: Convert to fraction form
    1,114.20/1,537.32 = 720.75/x
  3. Step 3: Cross multiply
    1,114.20x = 1,537.32 × 720.75
  4. Step 4: Simplify right side
    1,114.20x = 1,108,023.39
  5. Step 5: Solve for x
    x = 1,108,023.39/1,114.20
  6. Step 6: Final answer
    x = 994.46

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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.