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Finding the Fourth Proportional to 663,352.40, 994,445.40 and 397,218.80

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Solution

The fourth proportional to 663,352.40, 994,445.40 and 397,218.80 is: 595,478.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,352.40 : 994,445.40 = 397,218.80 : x
  2. Step 2: Convert to fraction form
    663,352.40/994,445.40 = 397,218.80/x
  3. Step 3: Cross multiply
    663,352.40x = 994,445.40 × 397,218.80
  4. Step 4: Simplify right side
    663,352.40x = 395,012,408,453.52
  5. Step 5: Solve for x
    x = 395,012,408,453.52/663,352.40
  6. Step 6: Final answer
    x = 595,478.98

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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.