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Finding the Fourth Proportional to 1,133.19, 1,564.72 and 691.34

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Solution

The fourth proportional to 1,133.19, 1,564.72 and 691.34 is: 954.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,133.19 : 1,564.72 = 691.34 : x
  2. Step 2: Convert to fraction form
    1,133.19/1,564.72 = 691.34/x
  3. Step 3: Cross multiply
    1,133.19x = 1,564.72 × 691.34
  4. Step 4: Simplify right side
    1,133.19x = 1,081,743.97
  5. Step 5: Solve for x
    x = 1,081,743.97/1,133.19
  6. Step 6: Final answer
    x = 954.60

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Half scale
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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.