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Finding the Fourth Proportional to 661,843.20, 992,764.80 and 551,618.40

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Solution

The fourth proportional to 661,843.20, 992,764.80 and 551,618.40 is: 827,427.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,843.20 : 992,764.80 = 551,618.40 : x
  2. Step 2: Convert to fraction form
    661,843.20/992,764.80 = 551,618.40/x
  3. Step 3: Cross multiply
    661,843.20x = 992,764.80 × 551,618.40
  4. Step 4: Simplify right side
    661,843.20x = 547,627,330,552.32
  5. Step 5: Solve for x
    x = 547,627,330,552.32/661,843.20
  6. Step 6: Final answer
    x = 827,427.60

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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.