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Finding the Fourth Proportional to 425,430.40, 638,145.60 and 267,966.40

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Solution

The fourth proportional to 425,430.40, 638,145.60 and 267,966.40 is: 401,949.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,430.40 : 638,145.60 = 267,966.40 : x
  2. Step 2: Convert to fraction form
    425,430.40/638,145.60 = 267,966.40/x
  3. Step 3: Cross multiply
    425,430.40x = 638,145.60 × 267,966.40
  4. Step 4: Simplify right side
    425,430.40x = 171,001,579,107.84
  5. Step 5: Solve for x
    x = 171,001,579,107.84/425,430.40
  6. Step 6: Final answer
    x = 401,949.60

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Similar ratio
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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.