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Finding the Fourth Proportional to 716.69, 989.13 and 433.12

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Solution

The fourth proportional to 716.69, 989.13 and 433.12 is: 597.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.69 : 989.13 = 433.12 : x
  2. Step 2: Convert to fraction form
    716.69/989.13 = 433.12/x
  3. Step 3: Cross multiply
    716.69x = 989.13 × 433.12
  4. Step 4: Simplify right side
    716.69x = 428,411.99
  5. Step 5: Solve for x
    x = 428,411.99/716.69
  6. Step 6: Final answer
    x = 597.76

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Double 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.