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Finding the Fourth Proportional to 714,166.61, 985,536.45 and 391,873.88

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Solution

The fourth proportional to 714,166.61, 985,536.45 and 391,873.88 is: 540,778.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,166.61 : 985,536.45 = 391,873.88 : x
  2. Step 2: Convert to fraction form
    714,166.61/985,536.45 = 391,873.88/x
  3. Step 3: Cross multiply
    714,166.61x = 985,536.45 × 391,873.88
  4. Step 4: Simplify right side
    714,166.61x = 386,205,995,006.77
  5. Step 5: Solve for x
    x = 386,205,995,006.77/714,166.61
  6. Step 6: Final answer
    x = 540,778.57

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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.