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Finding the Fourth Proportional to 921.33, 1,270.86 and 585.11

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Solution

The fourth proportional to 921.33, 1,270.86 and 585.11 is: 807.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.33 : 1,270.86 = 585.11 : x
  2. Step 2: Convert to fraction form
    921.33/1,270.86 = 585.11/x
  3. Step 3: Cross multiply
    921.33x = 1,270.86 × 585.11
  4. Step 4: Simplify right side
    921.33x = 743,586.54
  5. Step 5: Solve for x
    x = 743,586.54/921.33
  6. Step 6: Final answer
    x = 807.08

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Double scale
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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.