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Finding the Fourth Proportional to 1,416.48, 1,954.89 and 878.19

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Solution

The fourth proportional to 1,416.48, 1,954.89 and 878.19 is: 1,211.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.48 : 1,954.89 = 878.19 : x
  2. Step 2: Convert to fraction form
    1,416.48/1,954.89 = 878.19/x
  3. Step 3: Cross multiply
    1,416.48x = 1,954.89 × 878.19
  4. Step 4: Simplify right side
    1,416.48x = 1,716,764.85
  5. Step 5: Solve for x
    x = 1,716,764.85/1,416.48
  6. Step 6: Final answer
    x = 1,211.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.