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Finding the Fourth Proportional to 287,615.66, 397,627.02 and 215,871.12

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Solution

The fourth proportional to 287,615.66, 397,627.02 and 215,871.12 is: 298,440.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,615.66 : 397,627.02 = 215,871.12 : x
  2. Step 2: Convert to fraction form
    287,615.66/397,627.02 = 215,871.12/x
  3. Step 3: Cross multiply
    287,615.66x = 397,627.02 × 215,871.12
  4. Step 4: Simplify right side
    287,615.66x = 85,836,190,149.66
  5. Step 5: Solve for x
    x = 85,836,190,149.66/287,615.66
  6. Step 6: Final answer
    x = 298,440.60

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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.