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Finding the Fourth Proportional to 631,443.78, 871,409.52 and 376,942.68

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Solution

The fourth proportional to 631,443.78, 871,409.52 and 376,942.68 is: 520,191.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,443.78 : 871,409.52 = 376,942.68 : x
  2. Step 2: Convert to fraction form
    631,443.78/871,409.52 = 376,942.68/x
  3. Step 3: Cross multiply
    631,443.78x = 871,409.52 × 376,942.68
  4. Step 4: Simplify right side
    631,443.78x = 328,471,439,846.31
  5. Step 5: Solve for x
    x = 328,471,439,846.31/631,443.78
  6. Step 6: Final answer
    x = 520,191.11

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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.