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Finding the Fourth Proportional to 543,820.20, 815,730.30 and 343,053.60

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Solution

The fourth proportional to 543,820.20, 815,730.30 and 343,053.60 is: 514,580.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,820.20 : 815,730.30 = 343,053.60 : x
  2. Step 2: Convert to fraction form
    543,820.20/815,730.30 = 343,053.60/x
  3. Step 3: Cross multiply
    543,820.20x = 815,730.30 × 343,053.60
  4. Step 4: Simplify right side
    543,820.20x = 279,839,216,044.08
  5. Step 5: Solve for x
    x = 279,839,216,044.08/543,820.20
  6. Step 6: Final answer
    x = 514,580.40

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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.