Home / 509,905.64-703,671.19-280,486.43

Finding the Fourth Proportional to 509,905.64, 703,671.19 and 280,486.43

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Solution

The fourth proportional to 509,905.64, 703,671.19 and 280,486.43 is: 387,072.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,905.64 : 703,671.19 = 280,486.43 : x
  2. Step 2: Convert to fraction form
    509,905.64/703,671.19 = 280,486.43/x
  3. Step 3: Cross multiply
    509,905.64x = 703,671.19 × 280,486.43
  4. Step 4: Simplify right side
    509,905.64x = 197,370,219,976.95
  5. Step 5: Solve for x
    x = 197,370,219,976.95/509,905.64
  6. Step 6: Final answer
    x = 387,072.05

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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.