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Finding the Fourth Proportional to 1,267.68, 1,901.52 and 1,012.80

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Solution

The fourth proportional to 1,267.68, 1,901.52 and 1,012.80 is: 1,519.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.68 : 1,901.52 = 1,012.80 : x
  2. Step 2: Convert to fraction form
    1,267.68/1,901.52 = 1,012.80/x
  3. Step 3: Cross multiply
    1,267.68x = 1,901.52 × 1,012.80
  4. Step 4: Simplify right side
    1,267.68x = 1,925,859.46
  5. Step 5: Solve for x
    x = 1,925,859.46/1,267.68
  6. Step 6: Final answer
    x = 1,519.20

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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.