Home / 1,412.38-1,948.95-1,118.38

Finding the Fourth Proportional to 1,412.38, 1,948.95 and 1,118.38

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Solution

The fourth proportional to 1,412.38, 1,948.95 and 1,118.38 is: 1,543.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.38 : 1,948.95 = 1,118.38 : x
  2. Step 2: Convert to fraction form
    1,412.38/1,948.95 = 1,118.38/x
  3. Step 3: Cross multiply
    1,412.38x = 1,948.95 × 1,118.38
  4. Step 4: Simplify right side
    1,412.38x = 2,179,666.70
  5. Step 5: Solve for x
    x = 2,179,666.70/1,412.38
  6. Step 6: Final answer
    x = 1,543.26

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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.