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Finding the Fourth Proportional to 722,359.12, 996,864.44 and 400,074.72

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Solution

The fourth proportional to 722,359.12, 996,864.44 and 400,074.72 is: 552,108.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,359.12 : 996,864.44 = 400,074.72 : x
  2. Step 2: Convert to fraction form
    722,359.12/996,864.44 = 400,074.72/x
  3. Step 3: Cross multiply
    722,359.12x = 996,864.44 × 400,074.72
  4. Step 4: Simplify right side
    722,359.12x = 398,820,261,710.96
  5. Step 5: Solve for x
    x = 398,820,261,710.96/722,359.12
  6. Step 6: Final answer
    x = 552,108.02

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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.