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Finding the Fourth Proportional to 800.88, 1,199.88 and 785.04

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Solution

The fourth proportional to 800.88, 1,199.88 and 785.04 is: 1,176.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.88 : 1,199.88 = 785.04 : x
  2. Step 2: Convert to fraction form
    800.88/1,199.88 = 785.04/x
  3. Step 3: Cross multiply
    800.88x = 1,199.88 × 785.04
  4. Step 4: Simplify right side
    800.88x = 941,953.80
  5. Step 5: Solve for x
    x = 941,953.80/800.88
  6. Step 6: Final answer
    x = 1,176.15

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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.