Home / 1,543.80-2,124.88-1,396.12

Finding the Fourth Proportional to 1,543.80, 2,124.88 and 1,396.12

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Solution

The fourth proportional to 1,543.80, 2,124.88 and 1,396.12 is: 1,921.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.80 : 2,124.88 = 1,396.12 : x
  2. Step 2: Convert to fraction form
    1,543.80/2,124.88 = 1,396.12/x
  3. Step 3: Cross multiply
    1,543.80x = 2,124.88 × 1,396.12
  4. Step 4: Simplify right side
    1,543.80x = 2,966,587.47
  5. Step 5: Solve for x
    x = 2,966,587.47/1,543.80
  6. Step 6: Final answer
    x = 1,921.61

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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.