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Finding the Fourth Proportional to 256,138.30, 359,118.50 and 256,138.30

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Solution

The fourth proportional to 256,138.30, 359,118.50 and 256,138.30 is: 359,118.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,138.30 : 359,118.50 = 256,138.30 : x
  2. Step 2: Convert to fraction form
    256,138.30/359,118.50 = 256,138.30/x
  3. Step 3: Cross multiply
    256,138.30x = 359,118.50 × 256,138.30
  4. Step 4: Simplify right side
    256,138.30x = 91,984,002,088.55
  5. Step 5: Solve for x
    x = 91,984,002,088.55/256,138.30
  6. Step 6: Final answer
    x = 359,118.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.