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Finding the Fourth Proportional to 427,224.85, 640,873.73 and 111,681.25

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Solution

The fourth proportional to 427,224.85, 640,873.73 and 111,681.25 is: 167,531.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,224.85 : 640,873.73 = 111,681.25 : x
  2. Step 2: Convert to fraction form
    427,224.85/640,873.73 = 111,681.25/x
  3. Step 3: Cross multiply
    427,224.85x = 640,873.73 × 111,681.25
  4. Step 4: Simplify right side
    427,224.85x = 71,573,579,258.56
  5. Step 5: Solve for x
    x = 71,573,579,258.56/427,224.85
  6. Step 6: Final answer
    x = 167,531.40

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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.