Home / 1,543.71-2,130.31-845.09

Finding the Fourth Proportional to 1,543.71, 2,130.31 and 845.09

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Solution

The fourth proportional to 1,543.71, 2,130.31 and 845.09 is: 1,166.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.71 : 2,130.31 = 845.09 : x
  2. Step 2: Convert to fraction form
    1,543.71/2,130.31 = 845.09/x
  3. Step 3: Cross multiply
    1,543.71x = 2,130.31 × 845.09
  4. Step 4: Simplify right side
    1,543.71x = 1,800,288.80
  5. Step 5: Solve for x
    x = 1,800,288.80/1,543.71
  6. Step 6: Final answer
    x = 1,166.21

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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.