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Finding the Fourth Proportional to 543,287.30, 815,040.30 and 455,151.20

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Solution

The fourth proportional to 543,287.30, 815,040.30 and 455,151.20 is: 682,818.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,287.30 : 815,040.30 = 455,151.20 : x
  2. Step 2: Convert to fraction form
    543,287.30/815,040.30 = 455,151.20/x
  3. Step 3: Cross multiply
    543,287.30x = 815,040.30 × 455,151.20
  4. Step 4: Simplify right side
    543,287.30x = 370,966,570,593.36
  5. Step 5: Solve for x
    x = 370,966,570,593.36/543,287.30
  6. Step 6: Final answer
    x = 682,818.41

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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.