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Finding the Fourth Proportional to 664,447.80, 996,671.70 and 398,071.20

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Solution

The fourth proportional to 664,447.80, 996,671.70 and 398,071.20 is: 597,106.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,447.80 : 996,671.70 = 398,071.20 : x
  2. Step 2: Convert to fraction form
    664,447.80/996,671.70 = 398,071.20/x
  3. Step 3: Cross multiply
    664,447.80x = 996,671.70 × 398,071.20
  4. Step 4: Simplify right side
    664,447.80x = 396,746,299,625.04
  5. Step 5: Solve for x
    x = 396,746,299,625.04/664,447.80
  6. Step 6: Final answer
    x = 597,106.80

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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.