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Finding the Fourth Proportional to 982,871.09, 1,356,780.60 and 660,768

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Solution

The fourth proportional to 982,871.09, 1,356,780.60 and 660,768 is: 912,141.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    982,871.09 : 1,356,780.60 = 660,768 : x
  2. Step 2: Convert to fraction form
    982,871.09/1,356,780.60 = 660,768/x
  3. Step 3: Cross multiply
    982,871.09x = 1,356,780.60 × 660,768
  4. Step 4: Simplify right side
    982,871.09x = 896,517,203,500.80
  5. Step 5: Solve for x
    x = 896,517,203,500.80/982,871.09
  6. Step 6: Final answer
    x = 912,141.19

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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.