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Finding the Fourth Proportional to 425,426.40, 638,139.60 and 267,962.40

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Solution

The fourth proportional to 425,426.40, 638,139.60 and 267,962.40 is: 401,943.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,426.40 : 638,139.60 = 267,962.40 : x
  2. Step 2: Convert to fraction form
    425,426.40/638,139.60 = 267,962.40/x
  3. Step 3: Cross multiply
    425,426.40x = 638,139.60 × 267,962.40
  4. Step 4: Simplify right side
    425,426.40x = 170,997,418,751.04
  5. Step 5: Solve for x
    x = 170,997,418,751.04/425,426.40
  6. Step 6: Final answer
    x = 401,943.60

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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.