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Finding the Fourth Proportional to 1,575.48, 2,362.74 and 891

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Solution

The fourth proportional to 1,575.48, 2,362.74 and 891 is: 1,336.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.48 : 2,362.74 = 891 : x
  2. Step 2: Convert to fraction form
    1,575.48/2,362.74 = 891/x
  3. Step 3: Cross multiply
    1,575.48x = 2,362.74 × 891
  4. Step 4: Simplify right side
    1,575.48x = 2,105,201.34
  5. Step 5: Solve for x
    x = 2,105,201.34/1,575.48
  6. Step 6: Final answer
    x = 1,336.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.