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Finding the Fourth Proportional to 256,046.40, 384,069.60 and 143,611.20

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Solution

The fourth proportional to 256,046.40, 384,069.60 and 143,611.20 is: 215,416.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,046.40 : 384,069.60 = 143,611.20 : x
  2. Step 2: Convert to fraction form
    256,046.40/384,069.60 = 143,611.20/x
  3. Step 3: Cross multiply
    256,046.40x = 384,069.60 × 143,611.20
  4. Step 4: Simplify right side
    256,046.40x = 55,156,696,139.52
  5. Step 5: Solve for x
    x = 55,156,696,139.52/256,046.40
  6. Step 6: Final answer
    x = 215,416.80

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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.