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Finding the Fourth Proportional to 427,153.04, 640,720.92 and 127,634.48

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Solution

The fourth proportional to 427,153.04, 640,720.92 and 127,634.48 is: 191,449.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,153.04 : 640,720.92 = 127,634.48 : x
  2. Step 2: Convert to fraction form
    427,153.04/640,720.92 = 127,634.48/x
  3. Step 3: Cross multiply
    427,153.04x = 640,720.92 × 127,634.48
  4. Step 4: Simplify right side
    427,153.04x = 81,778,081,449.32
  5. Step 5: Solve for x
    x = 81,778,081,449.32/427,153.04
  6. Step 6: Final answer
    x = 191,449.14

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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.