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Finding the Fourth Proportional to 1,316.86, 1,972.45 and 622.48

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Solution

The fourth proportional to 1,316.86, 1,972.45 and 622.48 is: 932.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.86 : 1,972.45 = 622.48 : x
  2. Step 2: Convert to fraction form
    1,316.86/1,972.45 = 622.48/x
  3. Step 3: Cross multiply
    1,316.86x = 1,972.45 × 622.48
  4. Step 4: Simplify right side
    1,316.86x = 1,227,810.68
  5. Step 5: Solve for x
    x = 1,227,810.68/1,316.86
  6. Step 6: Final answer
    x = 932.38

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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.