Home / 1,276.52-1,899.50-1,272.20

Finding the Fourth Proportional to 1,276.52, 1,899.50 and 1,272.20

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Solution

The fourth proportional to 1,276.52, 1,899.50 and 1,272.20 is: 1,893.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.52 : 1,899.50 = 1,272.20 : x
  2. Step 2: Convert to fraction form
    1,276.52/1,899.50 = 1,272.20/x
  3. Step 3: Cross multiply
    1,276.52x = 1,899.50 × 1,272.20
  4. Step 4: Simplify right side
    1,276.52x = 2,416,543.90
  5. Step 5: Solve for x
    x = 2,416,543.90/1,276.52
  6. Step 6: Final answer
    x = 1,893.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.