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Finding the Fourth Proportional to 1,306.23, 1,802.54 and 716.75

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Solution

The fourth proportional to 1,306.23, 1,802.54 and 716.75 is: 989.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.23 : 1,802.54 = 716.75 : x
  2. Step 2: Convert to fraction form
    1,306.23/1,802.54 = 716.75/x
  3. Step 3: Cross multiply
    1,306.23x = 1,802.54 × 716.75
  4. Step 4: Simplify right side
    1,306.23x = 1,291,971.47
  5. Step 5: Solve for x
    x = 1,291,971.47/1,306.23
  6. Step 6: Final answer
    x = 989.08

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Half scale
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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.