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Finding the Fourth Proportional to 503.08, 693.98 and 316.61

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Solution

The fourth proportional to 503.08, 693.98 and 316.61 is: 436.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.08 : 693.98 = 316.61 : x
  2. Step 2: Convert to fraction form
    503.08/693.98 = 316.61/x
  3. Step 3: Cross multiply
    503.08x = 693.98 × 316.61
  4. Step 4: Simplify right side
    503.08x = 219,721.01
  5. Step 5: Solve for x
    x = 219,721.01/503.08
  6. Step 6: Final answer
    x = 436.75

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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.