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Finding the Fourth Proportional to 1,145.75, 1,719.23 and 873.59

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Solution

The fourth proportional to 1,145.75, 1,719.23 and 873.59 is: 1,310.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.75 : 1,719.23 = 873.59 : x
  2. Step 2: Convert to fraction form
    1,145.75/1,719.23 = 873.59/x
  3. Step 3: Cross multiply
    1,145.75x = 1,719.23 × 873.59
  4. Step 4: Simplify right side
    1,145.75x = 1,501,889.17
  5. Step 5: Solve for x
    x = 1,501,889.17/1,145.75
  6. Step 6: Final answer
    x = 1,310.84

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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.