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Finding the Fourth Proportional to 256,621.64, 384,907.68 and 79,080.98

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Solution

The fourth proportional to 256,621.64, 384,907.68 and 79,080.98 is: 118,613.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,621.64 : 384,907.68 = 79,080.98 : x
  2. Step 2: Convert to fraction form
    256,621.64/384,907.68 = 79,080.98/x
  3. Step 3: Cross multiply
    256,621.64x = 384,907.68 × 79,080.98
  4. Step 4: Simplify right side
    256,621.64x = 30,438,876,543.93
  5. Step 5: Solve for x
    x = 30,438,876,543.93/256,621.64
  6. Step 6: Final answer
    x = 118,613.83

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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.