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Finding the Fourth Proportional to 583.92, 874.92 and 420.84

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Solution

The fourth proportional to 583.92, 874.92 and 420.84 is: 630.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.92 : 874.92 = 420.84 : x
  2. Step 2: Convert to fraction form
    583.92/874.92 = 420.84/x
  3. Step 3: Cross multiply
    583.92x = 874.92 × 420.84
  4. Step 4: Simplify right side
    583.92x = 368,201.33
  5. Step 5: Solve for x
    x = 368,201.33/583.92
  6. Step 6: Final answer
    x = 630.57

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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.