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Finding the Fourth Proportional to 855.93, 1,181.18 and 462.95

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Solution

The fourth proportional to 855.93, 1,181.18 and 462.95 is: 638.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.93 : 1,181.18 = 462.95 : x
  2. Step 2: Convert to fraction form
    855.93/1,181.18 = 462.95/x
  3. Step 3: Cross multiply
    855.93x = 1,181.18 × 462.95
  4. Step 4: Simplify right side
    855.93x = 546,819.06
  5. Step 5: Solve for x
    x = 546,819.06/855.93
  6. Step 6: Final answer
    x = 638.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.