Home / 1,543.65-2,128.09-1,306.66

Finding the Fourth Proportional to 1,543.65, 2,128.09 and 1,306.66

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Solution

The fourth proportional to 1,543.65, 2,128.09 and 1,306.66 is: 1,801.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.65 : 2,128.09 = 1,306.66 : x
  2. Step 2: Convert to fraction form
    1,543.65/2,128.09 = 1,306.66/x
  3. Step 3: Cross multiply
    1,543.65x = 2,128.09 × 1,306.66
  4. Step 4: Simplify right side
    1,543.65x = 2,780,690.08
  5. Step 5: Solve for x
    x = 2,780,690.08/1,543.65
  6. Step 6: Final answer
    x = 1,801.37

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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.