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Finding the Fourth Proportional to 722,820.78, 997,480.98 and 400,529.88

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Solution

The fourth proportional to 722,820.78, 997,480.98 and 400,529.88 is: 552,724.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,820.78 : 997,480.98 = 400,529.88 : x
  2. Step 2: Convert to fraction form
    722,820.78/997,480.98 = 400,529.88/x
  3. Step 3: Cross multiply
    722,820.78x = 997,480.98 × 400,529.88
  4. Step 4: Simplify right side
    722,820.78x = 399,520,937,221.68
  5. Step 5: Solve for x
    x = 399,520,937,221.68/722,820.78
  6. Step 6: Final answer
    x = 552,724.75

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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.