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Finding the Fourth Proportional to 267,656.40, 401,485.32 and 90,288

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Solution

The fourth proportional to 267,656.40, 401,485.32 and 90,288 is: 135,432.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,656.40 : 401,485.32 = 90,288 : x
  2. Step 2: Convert to fraction form
    267,656.40/401,485.32 = 90,288/x
  3. Step 3: Cross multiply
    267,656.40x = 401,485.32 × 90,288
  4. Step 4: Simplify right side
    267,656.40x = 36,249,306,572.16
  5. Step 5: Solve for x
    x = 36,249,306,572.16/267,656.40
  6. Step 6: Final answer
    x = 135,432.24

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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.