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Finding the Fourth Proportional to 285,517.60, 428,276.40 and 256,026.40

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Solution

The fourth proportional to 285,517.60, 428,276.40 and 256,026.40 is: 384,039.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,517.60 : 428,276.40 = 256,026.40 : x
  2. Step 2: Convert to fraction form
    285,517.60/428,276.40 = 256,026.40/x
  3. Step 3: Cross multiply
    285,517.60x = 428,276.40 × 256,026.40
  4. Step 4: Simplify right side
    285,517.60x = 109,650,064,896.96
  5. Step 5: Solve for x
    x = 109,650,064,896.96/285,517.60
  6. Step 6: Final answer
    x = 384,039.60

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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.