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Finding the Fourth Proportional to 780.49, 1,165.72 and 626.71

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Solution

The fourth proportional to 780.49, 1,165.72 and 626.71 is: 936.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    780.49 : 1,165.72 = 626.71 : x
  2. Step 2: Convert to fraction form
    780.49/1,165.72 = 626.71/x
  3. Step 3: Cross multiply
    780.49x = 1,165.72 × 626.71
  4. Step 4: Simplify right side
    780.49x = 730,568.78
  5. Step 5: Solve for x
    x = 730,568.78/780.49
  6. Step 6: Final answer
    x = 936.04

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1.5x scale

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.