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Finding the Fourth Proportional to 1,016.45, 1,402.70 and 550.70

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Solution

The fourth proportional to 1,016.45, 1,402.70 and 550.70 is: 759.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,016.45 : 1,402.70 = 550.70 : x
  2. Step 2: Convert to fraction form
    1,016.45/1,402.70 = 550.70/x
  3. Step 3: Cross multiply
    1,016.45x = 1,402.70 × 550.70
  4. Step 4: Simplify right side
    1,016.45x = 772,457.12
  5. Step 5: Solve for x
    x = 772,457.12/1,016.45
  6. Step 6: Final answer
    x = 759.96

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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.