Home / 1,580.85-2,181.68-917.93

Finding the Fourth Proportional to 1,580.85, 2,181.68 and 917.93

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Solution

The fourth proportional to 1,580.85, 2,181.68 and 917.93 is: 1,266.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.85 : 2,181.68 = 917.93 : x
  2. Step 2: Convert to fraction form
    1,580.85/2,181.68 = 917.93/x
  3. Step 3: Cross multiply
    1,580.85x = 2,181.68 × 917.93
  4. Step 4: Simplify right side
    1,580.85x = 2,002,614.02
  5. Step 5: Solve for x
    x = 2,002,614.02/1,580.85
  6. Step 6: Final answer
    x = 1,266.80

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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.