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Finding the Fourth Proportional to 1,969.88, 2,955.06 and 653.12

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Solution

The fourth proportional to 1,969.88, 2,955.06 and 653.12 is: 979.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.88 : 2,955.06 = 653.12 : x
  2. Step 2: Convert to fraction form
    1,969.88/2,955.06 = 653.12/x
  3. Step 3: Cross multiply
    1,969.88x = 2,955.06 × 653.12
  4. Step 4: Simplify right side
    1,969.88x = 1,930,008.79
  5. Step 5: Solve for x
    x = 1,930,008.79/1,969.88
  6. Step 6: Final answer
    x = 979.76

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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.