Home / 1,581.15-2,182.04-918.24

Finding the Fourth Proportional to 1,581.15, 2,182.04 and 918.24

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Solution

The fourth proportional to 1,581.15, 2,182.04 and 918.24 is: 1,267.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.15 : 2,182.04 = 918.24 : x
  2. Step 2: Convert to fraction form
    1,581.15/2,182.04 = 918.24/x
  3. Step 3: Cross multiply
    1,581.15x = 2,182.04 × 918.24
  4. Step 4: Simplify right side
    1,581.15x = 2,003,627.08
  5. Step 5: Solve for x
    x = 2,003,627.08/1,581.15
  6. Step 6: Final answer
    x = 1,267.19

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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.