Home / 1,543.77-2,131.05-1,071.57

Finding the Fourth Proportional to 1,543.77, 2,131.05 and 1,071.57

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Solution

The fourth proportional to 1,543.77, 2,131.05 and 1,071.57 is: 1,479.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.77 : 2,131.05 = 1,071.57 : x
  2. Step 2: Convert to fraction form
    1,543.77/2,131.05 = 1,071.57/x
  3. Step 3: Cross multiply
    1,543.77x = 2,131.05 × 1,071.57
  4. Step 4: Simplify right side
    1,543.77x = 2,283,569.25
  5. Step 5: Solve for x
    x = 2,283,569.25/1,543.77
  6. Step 6: Final answer
    x = 1,479.22

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1.5x scale

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.