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Finding the Fourth Proportional to 1,347.71, 2,021.56 and 616.91

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Solution

The fourth proportional to 1,347.71, 2,021.56 and 616.91 is: 925.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.71 : 2,021.56 = 616.91 : x
  2. Step 2: Convert to fraction form
    1,347.71/2,021.56 = 616.91/x
  3. Step 3: Cross multiply
    1,347.71x = 2,021.56 × 616.91
  4. Step 4: Simplify right side
    1,347.71x = 1,247,108.93
  5. Step 5: Solve for x
    x = 1,247,108.93/1,347.71
  6. Step 6: Final answer
    x = 925.36

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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.