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Finding the Fourth Proportional to 425,793.60, 638,690.40 and 268,718.40

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Solution

The fourth proportional to 425,793.60, 638,690.40 and 268,718.40 is: 403,077.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,793.60 : 638,690.40 = 268,718.40 : x
  2. Step 2: Convert to fraction form
    425,793.60/638,690.40 = 268,718.40/x
  3. Step 3: Cross multiply
    425,793.60x = 638,690.40 × 268,718.40
  4. Step 4: Simplify right side
    425,793.60x = 171,627,862,383.36
  5. Step 5: Solve for x
    x = 171,627,862,383.36/425,793.60
  6. Step 6: Final answer
    x = 403,077.60

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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.