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Finding the Fourth Proportional to 579,628.60, 869,151.30 and 343,043.80

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Solution

The fourth proportional to 579,628.60, 869,151.30 and 343,043.80 is: 514,393.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,628.60 : 869,151.30 = 343,043.80 : x
  2. Step 2: Convert to fraction form
    579,628.60/869,151.30 = 343,043.80/x
  3. Step 3: Cross multiply
    579,628.60x = 869,151.30 × 343,043.80
  4. Step 4: Simplify right side
    579,628.60x = 298,156,964,726.94
  5. Step 5: Solve for x
    x = 298,156,964,726.94/579,628.60
  6. Step 6: Final answer
    x = 514,393.12

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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.