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Finding the Fourth Proportional to 256,005.20, 384,468.60 and 247,710.80

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Solution

The fourth proportional to 256,005.20, 384,468.60 and 247,710.80 is: 372,012.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,005.20 : 384,468.60 = 247,710.80 : x
  2. Step 2: Convert to fraction form
    256,005.20/384,468.60 = 247,710.80/x
  3. Step 3: Cross multiply
    256,005.20x = 384,468.60 × 247,710.80
  4. Step 4: Simplify right side
    256,005.20x = 95,237,024,480.88
  5. Step 5: Solve for x
    x = 95,237,024,480.88/256,005.20
  6. Step 6: Final answer
    x = 372,012.07

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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.