Home / 1,171.10-1,612.84-1,145.58

Finding the Fourth Proportional to 1,171.10, 1,612.84 and 1,145.58

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Solution

The fourth proportional to 1,171.10, 1,612.84 and 1,145.58 is: 1,577.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.10 : 1,612.84 = 1,145.58 : x
  2. Step 2: Convert to fraction form
    1,171.10/1,612.84 = 1,145.58/x
  3. Step 3: Cross multiply
    1,171.10x = 1,612.84 × 1,145.58
  4. Step 4: Simplify right side
    1,171.10x = 1,847,637.25
  5. Step 5: Solve for x
    x = 1,847,637.25/1,171.10
  6. Step 6: Final answer
    x = 1,577.69

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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.