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Finding the Fourth Proportional to 267,938.40, 401,216.40 and 212,642.40

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Solution

The fourth proportional to 267,938.40, 401,216.40 and 212,642.40 is: 318,415.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,938.40 : 401,216.40 = 212,642.40 : x
  2. Step 2: Convert to fraction form
    267,938.40/401,216.40 = 212,642.40/x
  3. Step 3: Cross multiply
    267,938.40x = 401,216.40 × 212,642.40
  4. Step 4: Simplify right side
    267,938.40x = 85,315,618,215.36
  5. Step 5: Solve for x
    x = 85,315,618,215.36/267,938.40
  6. Step 6: Final answer
    x = 318,415.05

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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.