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Finding the Fourth Proportional to 855.81, 1,181.01 and 462.83

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Solution

The fourth proportional to 855.81, 1,181.01 and 462.83 is: 638.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.81 : 1,181.01 = 462.83 : x
  2. Step 2: Convert to fraction form
    855.81/1,181.01 = 462.83/x
  3. Step 3: Cross multiply
    855.81x = 1,181.01 × 462.83
  4. Step 4: Simplify right side
    855.81x = 546,605.06
  5. Step 5: Solve for x
    x = 546,605.06/855.81
  6. Step 6: Final answer
    x = 638.70

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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.