Home / 1,150.10-1,586.28-818.40

Finding the Fourth Proportional to 1,150.10, 1,586.28 and 818.40

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Solution

The fourth proportional to 1,150.10, 1,586.28 and 818.40 is: 1,128.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,150.10 : 1,586.28 = 818.40 : x
  2. Step 2: Convert to fraction form
    1,150.10/1,586.28 = 818.40/x
  3. Step 3: Cross multiply
    1,150.10x = 1,586.28 × 818.40
  4. Step 4: Simplify right side
    1,150.10x = 1,298,220.57
  5. Step 5: Solve for x
    x = 1,298,220.57/1,150.10
  6. Step 6: Final answer
    x = 1,128.79

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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.