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Finding the Fourth Proportional to 663,345.40, 994,434.90 and 397,211.80

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Solution

The fourth proportional to 663,345.40, 994,434.90 and 397,211.80 is: 595,468.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,345.40 : 994,434.90 = 397,211.80 : x
  2. Step 2: Convert to fraction form
    663,345.40/994,434.90 = 397,211.80/x
  3. Step 3: Cross multiply
    663,345.40x = 994,434.90 × 397,211.80
  4. Step 4: Simplify right side
    663,345.40x = 395,001,276,611.82
  5. Step 5: Solve for x
    x = 395,001,276,611.82/663,345.40
  6. Step 6: Final answer
    x = 595,468.48

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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.