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Finding the Fourth Proportional to 256,335.60, 384,532.20 and 78,841.20

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Solution

The fourth proportional to 256,335.60, 384,532.20 and 78,841.20 is: 118,270.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,335.60 : 384,532.20 = 78,841.20 : x
  2. Step 2: Convert to fraction form
    256,335.60/384,532.20 = 78,841.20/x
  3. Step 3: Cross multiply
    256,335.60x = 384,532.20 × 78,841.20
  4. Step 4: Simplify right side
    256,335.60x = 30,316,980,086.64
  5. Step 5: Solve for x
    x = 30,316,980,086.64/256,335.60
  6. Step 6: Final answer
    x = 118,270.66

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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.