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Finding the Fourth Proportional to 1,309.97, 1,964.83 and 616.48

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Solution

The fourth proportional to 1,309.97, 1,964.83 and 616.48 is: 924.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.97 : 1,964.83 = 616.48 : x
  2. Step 2: Convert to fraction form
    1,309.97/1,964.83 = 616.48/x
  3. Step 3: Cross multiply
    1,309.97x = 1,964.83 × 616.48
  4. Step 4: Simplify right side
    1,309.97x = 1,211,278.40
  5. Step 5: Solve for x
    x = 1,211,278.40/1,309.97
  6. Step 6: Final answer
    x = 924.66

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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.