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Finding the Fourth Proportional to 427,074.93, 640,604.30 and 127,556.37

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Solution

The fourth proportional to 427,074.93, 640,604.30 and 127,556.37 is: 191,332.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,074.93 : 640,604.30 = 127,556.37 : x
  2. Step 2: Convert to fraction form
    427,074.93/640,604.30 = 127,556.37/x
  3. Step 3: Cross multiply
    427,074.93x = 640,604.30 × 127,556.37
  4. Step 4: Simplify right side
    427,074.93x = 81,713,158,476.61
  5. Step 5: Solve for x
    x = 81,713,158,476.61/427,074.93
  6. Step 6: Final answer
    x = 191,332.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.