Home / 1,581.44-2,372.15-485.66

Finding the Fourth Proportional to 1,581.44, 2,372.15 and 485.66

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Solution

The fourth proportional to 1,581.44, 2,372.15 and 485.66 is: 728.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.44 : 2,372.15 = 485.66 : x
  2. Step 2: Convert to fraction form
    1,581.44/2,372.15 = 485.66/x
  3. Step 3: Cross multiply
    1,581.44x = 2,372.15 × 485.66
  4. Step 4: Simplify right side
    1,581.44x = 1,152,065.51
  5. Step 5: Solve for x
    x = 1,152,065.51/1,581.44
  6. Step 6: Final answer
    x = 728.49

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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.