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Finding the Fourth Proportional to 922,049.12, 1,271,712.30 and 818,791.92

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Solution

The fourth proportional to 922,049.12, 1,271,712.30 and 818,791.92 is: 1,129,297.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,049.12 : 1,271,712.30 = 818,791.92 : x
  2. Step 2: Convert to fraction form
    922,049.12/1,271,712.30 = 818,791.92/x
  3. Step 3: Cross multiply
    922,049.12x = 1,271,712.30 × 818,791.92
  4. Step 4: Simplify right side
    922,049.12x = 1,041,267,755,804.62
  5. Step 5: Solve for x
    x = 1,041,267,755,804.62/922,049.12
  6. Step 6: Final answer
    x = 1,129,297.49

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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.