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Finding the Fourth Proportional to 1,968, 2,715.48 and 1,445.28

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Solution

The fourth proportional to 1,968, 2,715.48 and 1,445.28 is: 1,994.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,968 : 2,715.48 = 1,445.28 : x
  2. Step 2: Convert to fraction form
    1,968/2,715.48 = 1,445.28/x
  3. Step 3: Cross multiply
    1,968x = 2,715.48 × 1,445.28
  4. Step 4: Simplify right side
    1,968x = 3,924,628.93
  5. Step 5: Solve for x
    x = 3,924,628.93/1,968
  6. Step 6: Final answer
    x = 1,994.22

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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.