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Finding the Fourth Proportional to 1,306.25, 1,802.46 and 716.63

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Solution

The fourth proportional to 1,306.25, 1,802.46 and 716.63 is: 988.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.25 : 1,802.46 = 716.63 : x
  2. Step 2: Convert to fraction form
    1,306.25/1,802.46 = 716.63/x
  3. Step 3: Cross multiply
    1,306.25x = 1,802.46 × 716.63
  4. Step 4: Simplify right side
    1,306.25x = 1,291,696.91
  5. Step 5: Solve for x
    x = 1,291,696.91/1,306.25
  6. Step 6: Final answer
    x = 988.86

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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.