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Finding the Fourth Proportional to 509,649.20, 703,254.78 and 280,168.64

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Solution

The fourth proportional to 509,649.20, 703,254.78 and 280,168.64 is: 386,599.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,649.20 : 703,254.78 = 280,168.64 : x
  2. Step 2: Convert to fraction form
    509,649.20/703,254.78 = 280,168.64/x
  3. Step 3: Cross multiply
    509,649.20x = 703,254.78 × 280,168.64
  4. Step 4: Simplify right side
    509,649.20x = 197,029,935,286.10
  5. Step 5: Solve for x
    x = 197,029,935,286.10/509,649.20
  6. Step 6: Final answer
    x = 386,599.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.