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Finding the Fourth Proportional to 503.89, 695.28 and 282.85

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Solution

The fourth proportional to 503.89, 695.28 and 282.85 is: 390.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.89 : 695.28 = 282.85 : x
  2. Step 2: Convert to fraction form
    503.89/695.28 = 282.85/x
  3. Step 3: Cross multiply
    503.89x = 695.28 × 282.85
  4. Step 4: Simplify right side
    503.89x = 196,659.95
  5. Step 5: Solve for x
    x = 196,659.95/503.89
  6. Step 6: Final answer
    x = 390.28

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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.