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Finding the Fourth Proportional to 1,948.96, 2,922.48 and 715.48

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Solution

The fourth proportional to 1,948.96, 2,922.48 and 715.48 is: 1,072.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,948.96 : 2,922.48 = 715.48 : x
  2. Step 2: Convert to fraction form
    1,948.96/2,922.48 = 715.48/x
  3. Step 3: Cross multiply
    1,948.96x = 2,922.48 × 715.48
  4. Step 4: Simplify right side
    1,948.96x = 2,090,975.99
  5. Step 5: Solve for x
    x = 2,090,975.99/1,948.96
  6. Step 6: Final answer
    x = 1,072.87

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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.