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Finding the Fourth Proportional to 914.76, 1,261.44 and 749.16

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Solution

The fourth proportional to 914.76, 1,261.44 and 749.16 is: 1,033.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.76 : 1,261.44 = 749.16 : x
  2. Step 2: Convert to fraction form
    914.76/1,261.44 = 749.16/x
  3. Step 3: Cross multiply
    914.76x = 1,261.44 × 749.16
  4. Step 4: Simplify right side
    914.76x = 945,020.39
  5. Step 5: Solve for x
    x = 945,020.39/914.76
  6. Step 6: Final answer
    x = 1,033.08

Related Problems

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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.