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Finding the Fourth Proportional to 1,416.68, 2,123.76 and 550.40

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Solution

The fourth proportional to 1,416.68, 2,123.76 and 550.40 is: 825.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.68 : 2,123.76 = 550.40 : x
  2. Step 2: Convert to fraction form
    1,416.68/2,123.76 = 550.40/x
  3. Step 3: Cross multiply
    1,416.68x = 2,123.76 × 550.40
  4. Step 4: Simplify right side
    1,416.68x = 1,168,917.50
  5. Step 5: Solve for x
    x = 1,168,917.50/1,416.68
  6. Step 6: Final answer
    x = 825.11

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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.