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Finding the Fourth Proportional to 400,361.55, 552,186.90 and 257,134.92

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Solution

The fourth proportional to 400,361.55, 552,186.90 and 257,134.92 is: 354,645.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,361.55 : 552,186.90 = 257,134.92 : x
  2. Step 2: Convert to fraction form
    400,361.55/552,186.90 = 257,134.92/x
  3. Step 3: Cross multiply
    400,361.55x = 552,186.90 × 257,134.92
  4. Step 4: Simplify right side
    400,361.55x = 141,986,534,356.55
  5. Step 5: Solve for x
    x = 141,986,534,356.55/400,361.55
  6. Step 6: Final answer
    x = 354,645.78

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1.5x scale

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.