Home / 509,723.78-703,436.85-280,298.45

Finding the Fourth Proportional to 509,723.78, 703,436.85 and 280,298.45

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Solution

The fourth proportional to 509,723.78, 703,436.85 and 280,298.45 is: 386,821.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,723.78 : 703,436.85 = 280,298.45 : x
  2. Step 2: Convert to fraction form
    509,723.78/703,436.85 = 280,298.45/x
  3. Step 3: Cross multiply
    509,723.78x = 703,436.85 × 280,298.45
  4. Step 4: Simplify right side
    509,723.78x = 197,172,260,486.48
  5. Step 5: Solve for x
    x = 197,172,260,486.48/509,723.78
  6. Step 6: Final answer
    x = 386,821.78

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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.