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Finding the Fourth Proportional to 1,459.25, 2,188.85 and 874.41

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Solution

The fourth proportional to 1,459.25, 2,188.85 and 874.41 is: 1,311.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,459.25 : 2,188.85 = 874.41 : x
  2. Step 2: Convert to fraction form
    1,459.25/2,188.85 = 874.41/x
  3. Step 3: Cross multiply
    1,459.25x = 2,188.85 × 874.41
  4. Step 4: Simplify right side
    1,459.25x = 1,913,954.51
  5. Step 5: Solve for x
    x = 1,913,954.51/1,459.25
  6. Step 6: Final answer
    x = 1,311.61

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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.