Home / 1,554.06-2,142.39-1,111.80

Finding the Fourth Proportional to 1,554.06, 2,142.39 and 1,111.80

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Solution

The fourth proportional to 1,554.06, 2,142.39 and 1,111.80 is: 1,532.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,554.06 : 2,142.39 = 1,111.80 : x
  2. Step 2: Convert to fraction form
    1,554.06/2,142.39 = 1,111.80/x
  3. Step 3: Cross multiply
    1,554.06x = 2,142.39 × 1,111.80
  4. Step 4: Simplify right side
    1,554.06x = 2,381,909.20
  5. Step 5: Solve for x
    x = 2,381,909.20/1,554.06
  6. Step 6: Final answer
    x = 1,532.70

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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.