Home / 1,272.90-1,908.12-614.36

Finding the Fourth Proportional to 1,272.90, 1,908.12 and 614.36

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Solution

The fourth proportional to 1,272.90, 1,908.12 and 614.36 is: 920.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.90 : 1,908.12 = 614.36 : x
  2. Step 2: Convert to fraction form
    1,272.90/1,908.12 = 614.36/x
  3. Step 3: Cross multiply
    1,272.90x = 1,908.12 × 614.36
  4. Step 4: Simplify right side
    1,272.90x = 1,172,272.60
  5. Step 5: Solve for x
    x = 1,172,272.60/1,272.90
  6. Step 6: Final answer
    x = 920.95

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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.