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Finding the Fourth Proportional to 319,745.60, 480,331.20 and 267,257.60

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Solution

The fourth proportional to 319,745.60, 480,331.20 and 267,257.60 is: 401,482.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,745.60 : 480,331.20 = 267,257.60 : x
  2. Step 2: Convert to fraction form
    319,745.60/480,331.20 = 267,257.60/x
  3. Step 3: Cross multiply
    319,745.60x = 480,331.20 × 267,257.60
  4. Step 4: Simplify right side
    319,745.60x = 128,372,163,717.12
  5. Step 5: Solve for x
    x = 128,372,163,717.12/319,745.60
  6. Step 6: Final answer
    x = 401,482.19

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1.5x scale

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.