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Finding the Fourth Proportional to 722,064.54, 996,515.90 and 399,774.63

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Solution

The fourth proportional to 722,064.54, 996,515.90 and 399,774.63 is: 551,726.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,064.54 : 996,515.90 = 399,774.63 : x
  2. Step 2: Convert to fraction form
    722,064.54/996,515.90 = 399,774.63/x
  3. Step 3: Cross multiply
    722,064.54x = 996,515.90 × 399,774.63
  4. Step 4: Simplify right side
    722,064.54x = 398,381,775,211.62
  5. Step 5: Solve for x
    x = 398,381,775,211.62/722,064.54
  6. Step 6: Final answer
    x = 551,726.00

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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.