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Finding the Fourth Proportional to 1,306.57, 1,803.09 and 717.10

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Solution

The fourth proportional to 1,306.57, 1,803.09 and 717.10 is: 989.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.57 : 1,803.09 = 717.10 : x
  2. Step 2: Convert to fraction form
    1,306.57/1,803.09 = 717.10/x
  3. Step 3: Cross multiply
    1,306.57x = 1,803.09 × 717.10
  4. Step 4: Simplify right side
    1,306.57x = 1,292,995.84
  5. Step 5: Solve for x
    x = 1,292,995.84/1,306.57
  6. Step 6: Final answer
    x = 989.61

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1.5x scale

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.