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Finding the Fourth Proportional to 878,693.70, 1,212,250.60 and 551,814.42

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Solution

The fourth proportional to 878,693.70, 1,212,250.60 and 551,814.42 is: 761,286.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,693.70 : 1,212,250.60 = 551,814.42 : x
  2. Step 2: Convert to fraction form
    878,693.70/1,212,250.60 = 551,814.42/x
  3. Step 3: Cross multiply
    878,693.70x = 1,212,250.60 × 551,814.42
  4. Step 4: Simplify right side
    878,693.70x = 668,937,361,733.65
  5. Step 5: Solve for x
    x = 668,937,361,733.65/878,693.70
  6. Step 6: Final answer
    x = 761,286.17

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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.