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Finding the Fourth Proportional to 543,240.80, 815,475.60 and 321,749.60

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Solution

The fourth proportional to 543,240.80, 815,475.60 and 321,749.60 is: 482,988.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,240.80 : 815,475.60 = 321,749.60 : x
  2. Step 2: Convert to fraction form
    543,240.80/815,475.60 = 321,749.60/x
  3. Step 3: Cross multiply
    543,240.80x = 815,475.60 × 321,749.60
  4. Step 4: Simplify right side
    543,240.80x = 262,378,948,109.76
  5. Step 5: Solve for x
    x = 262,378,948,109.76/543,240.80
  6. Step 6: Final answer
    x = 482,988.30

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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.