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Finding the Fourth Proportional to 722,635.43, 997,234.94 and 400,345.74

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Solution

The fourth proportional to 722,635.43, 997,234.94 and 400,345.74 is: 552,476.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,635.43 : 997,234.94 = 400,345.74 : x
  2. Step 2: Convert to fraction form
    722,635.43/997,234.94 = 400,345.74/x
  3. Step 3: Cross multiply
    722,635.43x = 997,234.94 × 400,345.74
  4. Step 4: Simplify right side
    722,635.43x = 399,238,761,009.02
  5. Step 5: Solve for x
    x = 399,238,761,009.02/722,635.43
  6. Step 6: Final answer
    x = 552,476.04

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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.