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Finding the Fourth Proportional to 503.35, 694.65 and 282.31

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Solution

The fourth proportional to 503.35, 694.65 and 282.31 is: 389.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.35 : 694.65 = 282.31 : x
  2. Step 2: Convert to fraction form
    503.35/694.65 = 282.31/x
  3. Step 3: Cross multiply
    503.35x = 694.65 × 282.31
  4. Step 4: Simplify right side
    503.35x = 196,106.64
  5. Step 5: Solve for x
    x = 196,106.64/503.35
  6. Step 6: Final answer
    x = 389.60

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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.