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Finding the Fourth Proportional to 664,864.40, 996,713.40 and 398,730.80

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Solution

The fourth proportional to 664,864.40, 996,713.40 and 398,730.80 is: 597,746.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,864.40 : 996,713.40 = 398,730.80 : x
  2. Step 2: Convert to fraction form
    664,864.40/996,713.40 = 398,730.80/x
  3. Step 3: Cross multiply
    664,864.40x = 996,713.40 × 398,730.80
  4. Step 4: Simplify right side
    664,864.40x = 397,420,331,352.72
  5. Step 5: Solve for x
    x = 397,420,331,352.72/664,864.40
  6. Step 6: Final answer
    x = 597,746.44

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1.5x scale

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.