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Finding the Fourth Proportional to 1,150.44, 1,587.69 and 646.26

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Solution

The fourth proportional to 1,150.44, 1,587.69 and 646.26 is: 891.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,150.44 : 1,587.69 = 646.26 : x
  2. Step 2: Convert to fraction form
    1,150.44/1,587.69 = 646.26/x
  3. Step 3: Cross multiply
    1,150.44x = 1,587.69 × 646.26
  4. Step 4: Simplify right side
    1,150.44x = 1,026,060.54
  5. Step 5: Solve for x
    x = 1,026,060.54/1,150.44
  6. Step 6: Final answer
    x = 891.89

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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.