Home / 1,580.31-2,180.93-1,317.87

Finding the Fourth Proportional to 1,580.31, 2,180.93 and 1,317.87

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Solution

The fourth proportional to 1,580.31, 2,180.93 and 1,317.87 is: 1,818.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.31 : 2,180.93 = 1,317.87 : x
  2. Step 2: Convert to fraction form
    1,580.31/2,180.93 = 1,317.87/x
  3. Step 3: Cross multiply
    1,580.31x = 2,180.93 × 1,317.87
  4. Step 4: Simplify right side
    1,580.31x = 2,874,175.63
  5. Step 5: Solve for x
    x = 2,874,175.63/1,580.31
  6. Step 6: Final answer
    x = 1,818.74

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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.