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Finding the Fourth Proportional to 855.06, 1,179.95 and 500.99

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Solution

The fourth proportional to 855.06, 1,179.95 and 500.99 is: 691.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.06 : 1,179.95 = 500.99 : x
  2. Step 2: Convert to fraction form
    855.06/1,179.95 = 500.99/x
  3. Step 3: Cross multiply
    855.06x = 1,179.95 × 500.99
  4. Step 4: Simplify right side
    855.06x = 591,143.15
  5. Step 5: Solve for x
    x = 591,143.15/855.06
  6. Step 6: Final answer
    x = 691.35

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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.