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Finding the Fourth Proportional to 456,641.76, 684,671.04 and 219,512.64

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Solution

The fourth proportional to 456,641.76, 684,671.04 and 219,512.64 is: 329,128.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,641.76 : 684,671.04 = 219,512.64 : x
  2. Step 2: Convert to fraction form
    456,641.76/684,671.04 = 219,512.64/x
  3. Step 3: Cross multiply
    456,641.76x = 684,671.04 × 219,512.64
  4. Step 4: Simplify right side
    456,641.76x = 150,293,947,521.95
  5. Step 5: Solve for x
    x = 150,293,947,521.95/456,641.76
  6. Step 6: Final answer
    x = 329,128.78

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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.