Home / 1,612.80-2,419.20-1,126.08

Finding the Fourth Proportional to 1,612.80, 2,419.20 and 1,126.08

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Solution

The fourth proportional to 1,612.80, 2,419.20 and 1,126.08 is: 1,689.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,612.80 : 2,419.20 = 1,126.08 : x
  2. Step 2: Convert to fraction form
    1,612.80/2,419.20 = 1,126.08/x
  3. Step 3: Cross multiply
    1,612.80x = 2,419.20 × 1,126.08
  4. Step 4: Simplify right side
    1,612.80x = 2,724,212.74
  5. Step 5: Solve for x
    x = 2,724,212.74/1,612.80
  6. Step 6: Final answer
    x = 1,689.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.