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Finding the Fourth Proportional to 256,925.36, 385,251.96 and 90,596.72

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Solution

The fourth proportional to 256,925.36, 385,251.96 and 90,596.72 is: 135,847.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,925.36 : 385,251.96 = 90,596.72 : x
  2. Step 2: Convert to fraction form
    256,925.36/385,251.96 = 90,596.72/x
  3. Step 3: Cross multiply
    256,925.36x = 385,251.96 × 90,596.72
  4. Step 4: Simplify right side
    256,925.36x = 34,902,563,949.57
  5. Step 5: Solve for x
    x = 34,902,563,949.57/256,925.36
  6. Step 6: Final answer
    x = 135,847.10

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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.