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Finding the Fourth Proportional to 982,872.09, 1,356,781.98 and 660,769

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Solution

The fourth proportional to 982,872.09, 1,356,781.98 and 660,769 is: 912,142.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    982,872.09 : 1,356,781.98 = 660,769 : x
  2. Step 2: Convert to fraction form
    982,872.09/1,356,781.98 = 660,769/x
  3. Step 3: Cross multiply
    982,872.09x = 1,356,781.98 × 660,769
  4. Step 4: Simplify right side
    982,872.09x = 896,519,472,142.62
  5. Step 5: Solve for x
    x = 896,519,472,142.62/982,872.09
  6. Step 6: Final answer
    x = 912,142.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.