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Finding the Fourth Proportional to 891.71, 1,230.07 and 626.56

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Solution

The fourth proportional to 891.71, 1,230.07 and 626.56 is: 864.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.71 : 1,230.07 = 626.56 : x
  2. Step 2: Convert to fraction form
    891.71/1,230.07 = 626.56/x
  3. Step 3: Cross multiply
    891.71x = 1,230.07 × 626.56
  4. Step 4: Simplify right side
    891.71x = 770,714.98
  5. Step 5: Solve for x
    x = 770,714.98/891.71
  6. Step 6: Final answer
    x = 864.31

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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.