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Finding the Fourth Proportional to 503.16, 693.80 and 316.43

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Solution

The fourth proportional to 503.16, 693.80 and 316.43 is: 436.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.16 : 693.80 = 316.43 : x
  2. Step 2: Convert to fraction form
    503.16/693.80 = 316.43/x
  3. Step 3: Cross multiply
    503.16x = 693.80 × 316.43
  4. Step 4: Simplify right side
    503.16x = 219,536.46
  5. Step 5: Solve for x
    x = 219,536.46/503.16
  6. Step 6: Final answer
    x = 436.32

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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.