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Finding the Fourth Proportional to 722,209.32, 996,648.30 and 399,919.41

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Solution

The fourth proportional to 722,209.32, 996,648.30 and 399,919.41 is: 551,888.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,209.32 : 996,648.30 = 399,919.41 : x
  2. Step 2: Convert to fraction form
    722,209.32/996,648.30 = 399,919.41/x
  3. Step 3: Cross multiply
    722,209.32x = 996,648.30 × 399,919.41
  4. Step 4: Simplify right side
    722,209.32x = 398,579,000,113.50
  5. Step 5: Solve for x
    x = 398,579,000,113.50/722,209.32
  6. Step 6: Final answer
    x = 551,888.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.