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Finding the Fourth Proportional to 916,613.80, 1,374,920.70 and 873,068.20

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Solution

The fourth proportional to 916,613.80, 1,374,920.70 and 873,068.20 is: 1,309,602.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,613.80 : 1,374,920.70 = 873,068.20 : x
  2. Step 2: Convert to fraction form
    916,613.80/1,374,920.70 = 873,068.20/x
  3. Step 3: Cross multiply
    916,613.80x = 1,374,920.70 × 873,068.20
  4. Step 4: Simplify right side
    916,613.80x = 1,200,399,540,691.74
  5. Step 5: Solve for x
    x = 1,200,399,540,691.74/916,613.80
  6. Step 6: Final answer
    x = 1,309,602.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.