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Finding the Fourth Proportional to 878,343.35, 1,211,868 and 551,691.68

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Solution

The fourth proportional to 878,343.35, 1,211,868 and 551,691.68 is: 761,180.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,343.35 : 1,211,868 = 551,691.68 : x
  2. Step 2: Convert to fraction form
    878,343.35/1,211,868 = 551,691.68/x
  3. Step 3: Cross multiply
    878,343.35x = 1,211,868 × 551,691.68
  4. Step 4: Simplify right side
    878,343.35x = 668,577,486,798.90
  5. Step 5: Solve for x
    x = 668,577,486,798.90/878,343.35
  6. Step 6: Final answer
    x = 761,180.11

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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.