Home / 1,742.31-2,612.55-919.91

Finding the Fourth Proportional to 1,742.31, 2,612.55 and 919.91

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Solution

The fourth proportional to 1,742.31, 2,612.55 and 919.91 is: 1,379.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,742.31 : 2,612.55 = 919.91 : x
  2. Step 2: Convert to fraction form
    1,742.31/2,612.55 = 919.91/x
  3. Step 3: Cross multiply
    1,742.31x = 2,612.55 × 919.91
  4. Step 4: Simplify right side
    1,742.31x = 2,403,306.16
  5. Step 5: Solve for x
    x = 2,403,306.16/1,742.31
  6. Step 6: Final answer
    x = 1,379.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.