Home / 1,543.27-2,128.80-1,123.06

Finding the Fourth Proportional to 1,543.27, 2,128.80 and 1,123.06

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Solution

The fourth proportional to 1,543.27, 2,128.80 and 1,123.06 is: 1,549.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.27 : 2,128.80 = 1,123.06 : x
  2. Step 2: Convert to fraction form
    1,543.27/2,128.80 = 1,123.06/x
  3. Step 3: Cross multiply
    1,543.27x = 2,128.80 × 1,123.06
  4. Step 4: Simplify right side
    1,543.27x = 2,390,770.13
  5. Step 5: Solve for x
    x = 2,390,770.13/1,543.27
  6. Step 6: Final answer
    x = 1,549.16

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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.