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Finding the Fourth Proportional to 1,263.53, 1,744.74 and 891.34

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Solution

The fourth proportional to 1,263.53, 1,744.74 and 891.34 is: 1,230.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.53 : 1,744.74 = 891.34 : x
  2. Step 2: Convert to fraction form
    1,263.53/1,744.74 = 891.34/x
  3. Step 3: Cross multiply
    1,263.53x = 1,744.74 × 891.34
  4. Step 4: Simplify right side
    1,263.53x = 1,555,152.19
  5. Step 5: Solve for x
    x = 1,555,152.19/1,263.53
  6. Step 6: Final answer
    x = 1,230.80

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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.