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Finding the Fourth Proportional to 312,459.32, 430,871.37 and 267,286.83

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Solution

The fourth proportional to 312,459.32, 430,871.37 and 267,286.83 is: 368,579.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,459.32 : 430,871.37 = 267,286.83 : x
  2. Step 2: Convert to fraction form
    312,459.32/430,871.37 = 267,286.83/x
  3. Step 3: Cross multiply
    312,459.32x = 430,871.37 × 267,286.83
  4. Step 4: Simplify right side
    312,459.32x = 115,166,242,625.06
  5. Step 5: Solve for x
    x = 115,166,242,625.06/312,459.32
  6. Step 6: Final answer
    x = 368,579.96

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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.