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Finding the Fourth Proportional to 438,960.60, 605,734.20 and 257,679.90

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Solution

The fourth proportional to 438,960.60, 605,734.20 and 257,679.90 is: 355,579.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,960.60 : 605,734.20 = 257,679.90 : x
  2. Step 2: Convert to fraction form
    438,960.60/605,734.20 = 257,679.90/x
  3. Step 3: Cross multiply
    438,960.60x = 605,734.20 × 257,679.90
  4. Step 4: Simplify right side
    438,960.60x = 156,085,528,082.58
  5. Step 5: Solve for x
    x = 156,085,528,082.58/438,960.60
  6. Step 6: Final answer
    x = 355,579.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.