Home / 1,308.48-1,961.76-614.79

Finding the Fourth Proportional to 1,308.48, 1,961.76 and 614.79

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Solution

The fourth proportional to 1,308.48, 1,961.76 and 614.79 is: 921.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.48 : 1,961.76 = 614.79 : x
  2. Step 2: Convert to fraction form
    1,308.48/1,961.76 = 614.79/x
  3. Step 3: Cross multiply
    1,308.48x = 1,961.76 × 614.79
  4. Step 4: Simplify right side
    1,308.48x = 1,206,072.74
  5. Step 5: Solve for x
    x = 1,206,072.74/1,308.48
  6. Step 6: Final answer
    x = 921.74

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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.