Home / 1,581.50-2,372.25-485.86

Finding the Fourth Proportional to 1,581.50, 2,372.25 and 485.86

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Solution

The fourth proportional to 1,581.50, 2,372.25 and 485.86 is: 728.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.50 : 2,372.25 = 485.86 : x
  2. Step 2: Convert to fraction form
    1,581.50/2,372.25 = 485.86/x
  3. Step 3: Cross multiply
    1,581.50x = 2,372.25 × 485.86
  4. Step 4: Simplify right side
    1,581.50x = 1,152,581.39
  5. Step 5: Solve for x
    x = 1,152,581.39/1,581.50
  6. Step 6: Final answer
    x = 728.79

Related Problems

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Double scale
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Similar ratio
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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.