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Finding the Fourth Proportional to 790,857, 1,186,040.16 and 285,352.20

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Solution

The fourth proportional to 790,857, 1,186,040.16 and 285,352.20 is: 427,939.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    790,857 : 1,186,040.16 = 285,352.20 : x
  2. Step 2: Convert to fraction form
    790,857/1,186,040.16 = 285,352.20/x
  3. Step 3: Cross multiply
    790,857x = 1,186,040.16 × 285,352.20
  4. Step 4: Simplify right side
    790,857x = 338,439,168,944.35
  5. Step 5: Solve for x
    x = 338,439,168,944.35/790,857
  6. Step 6: Final answer
    x = 427,939.78

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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.