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Finding the Fourth Proportional to 551,431.20, 827,632.80 and 326,510.40

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Solution

The fourth proportional to 551,431.20, 827,632.80 and 326,510.40 is: 490,053.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,431.20 : 827,632.80 = 326,510.40 : x
  2. Step 2: Convert to fraction form
    551,431.20/827,632.80 = 326,510.40/x
  3. Step 3: Cross multiply
    551,431.20x = 827,632.80 × 326,510.40
  4. Step 4: Simplify right side
    551,431.20x = 270,230,716,581.12
  5. Step 5: Solve for x
    x = 270,230,716,581.12/551,431.20
  6. Step 6: Final answer
    x = 490,053.37

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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.