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Finding the Fourth Proportional to 543,615.80, 815,423.70 and 455,042.30

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Solution

The fourth proportional to 543,615.80, 815,423.70 and 455,042.30 is: 682,563.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,615.80 : 815,423.70 = 455,042.30 : x
  2. Step 2: Convert to fraction form
    543,615.80/815,423.70 = 455,042.30/x
  3. Step 3: Cross multiply
    543,615.80x = 815,423.70 × 455,042.30
  4. Step 4: Simplify right side
    543,615.80x = 371,052,275,922.51
  5. Step 5: Solve for x
    x = 371,052,275,922.51/543,615.80
  6. Step 6: Final answer
    x = 682,563.45

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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.