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Finding the Fourth Proportional to 722,777.16, 997,431.50 and 400,508.12

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Solution

The fourth proportional to 722,777.16, 997,431.50 and 400,508.12 is: 552,700.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,777.16 : 997,431.50 = 400,508.12 : x
  2. Step 2: Convert to fraction form
    722,777.16/997,431.50 = 400,508.12/x
  3. Step 3: Cross multiply
    722,777.16x = 997,431.50 × 400,508.12
  4. Step 4: Simplify right side
    722,777.16x = 399,479,414,893.78
  5. Step 5: Solve for x
    x = 399,479,414,893.78/722,777.16
  6. Step 6: Final answer
    x = 552,700.66

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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.