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Finding the Fourth Proportional to 982,878.86, 1,356,791.36 and 660,775.77

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Solution

The fourth proportional to 982,878.86, 1,356,791.36 and 660,775.77 is: 912,151.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    982,878.86 : 1,356,791.36 = 660,775.77 : x
  2. Step 2: Convert to fraction form
    982,878.86/1,356,791.36 = 660,775.77/x
  3. Step 3: Cross multiply
    982,878.86x = 1,356,791.36 × 660,775.77
  4. Step 4: Simplify right side
    982,878.86x = 896,534,852,329.47
  5. Step 5: Solve for x
    x = 896,534,852,329.47/982,878.86
  6. Step 6: Final answer
    x = 912,151.94

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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.