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Finding the Fourth Proportional to 256,439.58, 384,696.90 and 78,962.10

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Solution

The fourth proportional to 256,439.58, 384,696.90 and 78,962.10 is: 118,454.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,439.58 : 384,696.90 = 78,962.10 : x
  2. Step 2: Convert to fraction form
    256,439.58/384,696.90 = 78,962.10/x
  3. Step 3: Cross multiply
    256,439.58x = 384,696.90 × 78,962.10
  4. Step 4: Simplify right side
    256,439.58x = 30,376,475,087.49
  5. Step 5: Solve for x
    x = 30,376,475,087.49/256,439.58
  6. Step 6: Final answer
    x = 118,454.71

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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.