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Finding the Fourth Proportional to 664,852.40, 996,695.40 and 398,718.80

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Solution

The fourth proportional to 664,852.40, 996,695.40 and 398,718.80 is: 597,728.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,852.40 : 996,695.40 = 398,718.80 : x
  2. Step 2: Convert to fraction form
    664,852.40/996,695.40 = 398,718.80/x
  3. Step 3: Cross multiply
    664,852.40x = 996,695.40 × 398,718.80
  4. Step 4: Simplify right side
    664,852.40x = 397,401,193,853.52
  5. Step 5: Solve for x
    x = 397,401,193,853.52/664,852.40
  6. Step 6: Final answer
    x = 597,728.45

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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.