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Finding the Fourth Proportional to 256,945.60, 385,418.40 and 162,467.20

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Solution

The fourth proportional to 256,945.60, 385,418.40 and 162,467.20 is: 243,700.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,945.60 : 385,418.40 = 162,467.20 : x
  2. Step 2: Convert to fraction form
    256,945.60/385,418.40 = 162,467.20/x
  3. Step 3: Cross multiply
    256,945.60x = 385,418.40 × 162,467.20
  4. Step 4: Simplify right side
    256,945.60x = 62,617,848,276.48
  5. Step 5: Solve for x
    x = 62,617,848,276.48/256,945.60
  6. Step 6: Final answer
    x = 243,700.80

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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.