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Finding the Fourth Proportional to 551,411.55, 827,117.33 and 218,987.55

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Solution

The fourth proportional to 551,411.55, 827,117.33 and 218,987.55 is: 328,481.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,411.55 : 827,117.33 = 218,987.55 : x
  2. Step 2: Convert to fraction form
    551,411.55/827,117.33 = 218,987.55/x
  3. Step 3: Cross multiply
    551,411.55x = 827,117.33 × 218,987.55
  4. Step 4: Simplify right side
    551,411.55x = 181,128,396,564.30
  5. Step 5: Solve for x
    x = 181,128,396,564.30/551,411.55
  6. Step 6: Final answer
    x = 328,481.33

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Double scale
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Similar ratio
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1.5x scale

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.