Home / 1,581.55-2,372.31-485.93

Finding the Fourth Proportional to 1,581.55, 2,372.31 and 485.93

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Solution

The fourth proportional to 1,581.55, 2,372.31 and 485.93 is: 728.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.55 : 2,372.31 = 485.93 : x
  2. Step 2: Convert to fraction form
    1,581.55/2,372.31 = 485.93/x
  3. Step 3: Cross multiply
    1,581.55x = 2,372.31 × 485.93
  4. Step 4: Simplify right side
    1,581.55x = 1,152,776.60
  5. Step 5: Solve for x
    x = 1,152,776.60/1,581.55
  6. Step 6: Final answer
    x = 728.89

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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.