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Finding the Fourth Proportional to 543,365.80, 815,048.70 and 343,911.40

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Solution

The fourth proportional to 543,365.80, 815,048.70 and 343,911.40 is: 515,867.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,365.80 : 815,048.70 = 343,911.40 : x
  2. Step 2: Convert to fraction form
    543,365.80/815,048.70 = 343,911.40/x
  3. Step 3: Cross multiply
    543,365.80x = 815,048.70 × 343,911.40
  4. Step 4: Simplify right side
    543,365.80x = 280,304,539,485.18
  5. Step 5: Solve for x
    x = 280,304,539,485.18/543,365.80
  6. Step 6: Final answer
    x = 515,867.10

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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.