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Finding the Fourth Proportional to 256,585.20, 385,266.60 and 197,487.60

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Solution

The fourth proportional to 256,585.20, 385,266.60 and 197,487.60 is: 296,530.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,585.20 : 385,266.60 = 197,487.60 : x
  2. Step 2: Convert to fraction form
    256,585.20/385,266.60 = 197,487.60/x
  3. Step 3: Cross multiply
    256,585.20x = 385,266.60 × 197,487.60
  4. Step 4: Simplify right side
    256,585.20x = 76,085,376,194.16
  5. Step 5: Solve for x
    x = 76,085,376,194.16/256,585.20
  6. Step 6: Final answer
    x = 296,530.65

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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.