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Finding the Fourth Proportional to 256,587.20, 385,269.60 and 197,489.60

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Solution

The fourth proportional to 256,587.20, 385,269.60 and 197,489.60 is: 296,533.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,587.20 : 385,269.60 = 197,489.60 : x
  2. Step 2: Convert to fraction form
    256,587.20/385,269.60 = 197,489.60/x
  3. Step 3: Cross multiply
    256,587.20x = 385,269.60 × 197,489.60
  4. Step 4: Simplify right side
    256,587.20x = 76,086,739,196.16
  5. Step 5: Solve for x
    x = 76,086,739,196.16/256,587.20
  6. Step 6: Final answer
    x = 296,533.65

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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.