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Finding the Fourth Proportional to 216,480.64, 298,549.78 and 135,915.64

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Solution

The fourth proportional to 216,480.64, 298,549.78 and 135,915.64 is: 187,442.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,480.64 : 298,549.78 = 135,915.64 : x
  2. Step 2: Convert to fraction form
    216,480.64/298,549.78 = 135,915.64/x
  3. Step 3: Cross multiply
    216,480.64x = 298,549.78 × 135,915.64
  4. Step 4: Simplify right side
    216,480.64x = 40,577,584,420.56
  5. Step 5: Solve for x
    x = 40,577,584,420.56/216,480.64
  6. Step 6: Final answer
    x = 187,442.09

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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.