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Finding the Fourth Proportional to 503.98, 695.66 and 317.83

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Solution

The fourth proportional to 503.98, 695.66 and 317.83 is: 438.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.98 : 695.66 = 317.83 : x
  2. Step 2: Convert to fraction form
    503.98/695.66 = 317.83/x
  3. Step 3: Cross multiply
    503.98x = 695.66 × 317.83
  4. Step 4: Simplify right side
    503.98x = 221,101.62
  5. Step 5: Solve for x
    x = 221,101.62/503.98
  6. Step 6: Final answer
    x = 438.71

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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.