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Finding the Fourth Proportional to 1,310.63, 1,965.30 and 616.71

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Solution

The fourth proportional to 1,310.63, 1,965.30 and 616.71 is: 924.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310.63 : 1,965.30 = 616.71 : x
  2. Step 2: Convert to fraction form
    1,310.63/1,965.30 = 616.71/x
  3. Step 3: Cross multiply
    1,310.63x = 1,965.30 × 616.71
  4. Step 4: Simplify right side
    1,310.63x = 1,212,010.34
  5. Step 5: Solve for x
    x = 1,212,010.34/1,310.63
  6. Step 6: Final answer
    x = 924.76

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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.