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Finding the Fourth Proportional to 551,080.80, 826,621.20 and 411,112.80

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Solution

The fourth proportional to 551,080.80, 826,621.20 and 411,112.80 is: 616,669.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,080.80 : 826,621.20 = 411,112.80 : x
  2. Step 2: Convert to fraction form
    551,080.80/826,621.20 = 411,112.80/x
  3. Step 3: Cross multiply
    551,080.80x = 826,621.20 × 411,112.80
  4. Step 4: Simplify right side
    551,080.80x = 339,834,556,071.36
  5. Step 5: Solve for x
    x = 339,834,556,071.36/551,080.80
  6. Step 6: Final answer
    x = 616,669.20

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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.