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Finding the Fourth Proportional to 716.40, 1,069.38 and 630

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Solution

The fourth proportional to 716.40, 1,069.38 and 630 is: 940.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.40 : 1,069.38 = 630 : x
  2. Step 2: Convert to fraction form
    716.40/1,069.38 = 630/x
  3. Step 3: Cross multiply
    716.40x = 1,069.38 × 630
  4. Step 4: Simplify right side
    716.40x = 673,709.40
  5. Step 5: Solve for x
    x = 673,709.40/716.40
  6. Step 6: Final answer
    x = 940.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.