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Finding the Fourth Proportional to 256,478.08, 353,933.12 and 143,301.60

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Solution

The fourth proportional to 256,478.08, 353,933.12 and 143,301.60 is: 197,752.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,478.08 : 353,933.12 = 143,301.60 : x
  2. Step 2: Convert to fraction form
    256,478.08/353,933.12 = 143,301.60/x
  3. Step 3: Cross multiply
    256,478.08x = 353,933.12 × 143,301.60
  4. Step 4: Simplify right side
    256,478.08x = 50,719,182,388.99
  5. Step 5: Solve for x
    x = 50,719,182,388.99/256,478.08
  6. Step 6: Final answer
    x = 197,752.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.