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Finding the Fourth Proportional to 1,254.68, 1,879.94 and 887.64

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Solution

The fourth proportional to 1,254.68, 1,879.94 and 887.64 is: 1,329.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.68 : 1,879.94 = 887.64 : x
  2. Step 2: Convert to fraction form
    1,254.68/1,879.94 = 887.64/x
  3. Step 3: Cross multiply
    1,254.68x = 1,879.94 × 887.64
  4. Step 4: Simplify right side
    1,254.68x = 1,668,705.50
  5. Step 5: Solve for x
    x = 1,668,705.50/1,254.68
  6. Step 6: Final answer
    x = 1,329.99

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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.