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Finding the Fourth Proportional to 722,178.74, 996,594.44 and 399,881.90

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Solution

The fourth proportional to 722,178.74, 996,594.44 and 399,881.90 is: 551,830.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,178.74 : 996,594.44 = 399,881.90 : x
  2. Step 2: Convert to fraction form
    722,178.74/996,594.44 = 399,881.90/x
  3. Step 3: Cross multiply
    722,178.74x = 996,594.44 × 399,881.90
  4. Step 4: Simplify right side
    722,178.74x = 398,520,078,196.64
  5. Step 5: Solve for x
    x = 398,520,078,196.64/722,178.74
  6. Step 6: Final answer
    x = 551,830.25

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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.