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Finding the Fourth Proportional to 664,420.40, 994,006.20 and 576,648.80

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Solution

The fourth proportional to 664,420.40, 994,006.20 and 576,648.80 is: 862,695.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,420.40 : 994,006.20 = 576,648.80 : x
  2. Step 2: Convert to fraction form
    664,420.40/994,006.20 = 576,648.80/x
  3. Step 3: Cross multiply
    664,420.40x = 994,006.20 × 576,648.80
  4. Step 4: Simplify right side
    664,420.40x = 573,192,482,422.56
  5. Step 5: Solve for x
    x = 573,192,482,422.56/664,420.40
  6. Step 6: Final answer
    x = 862,695.49

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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.