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Finding the Fourth Proportional to 1,172.59, 1,758.85 and 998.85

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Solution

The fourth proportional to 1,172.59, 1,758.85 and 998.85 is: 1,498.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,172.59 : 1,758.85 = 998.85 : x
  2. Step 2: Convert to fraction form
    1,172.59/1,758.85 = 998.85/x
  3. Step 3: Cross multiply
    1,172.59x = 1,758.85 × 998.85
  4. Step 4: Simplify right side
    1,172.59x = 1,756,827.32
  5. Step 5: Solve for x
    x = 1,756,827.32/1,172.59
  6. Step 6: Final answer
    x = 1,498.25

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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.