Home / 1,511.40-2,079.48-1,225.26

Finding the Fourth Proportional to 1,511.40, 2,079.48 and 1,225.26

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Solution

The fourth proportional to 1,511.40, 2,079.48 and 1,225.26 is: 1,685.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.40 : 2,079.48 = 1,225.26 : x
  2. Step 2: Convert to fraction form
    1,511.40/2,079.48 = 1,225.26/x
  3. Step 3: Cross multiply
    1,511.40x = 2,079.48 × 1,225.26
  4. Step 4: Simplify right side
    1,511.40x = 2,547,903.66
  5. Step 5: Solve for x
    x = 2,547,903.66/1,511.40
  6. Step 6: Final answer
    x = 1,685.79

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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.