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Finding the Fourth Proportional to 503.95, 695.28 and 317.37

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Solution

The fourth proportional to 503.95, 695.28 and 317.37 is: 437.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.95 : 695.28 = 317.37 : x
  2. Step 2: Convert to fraction form
    503.95/695.28 = 317.37/x
  3. Step 3: Cross multiply
    503.95x = 695.28 × 317.37
  4. Step 4: Simplify right side
    503.95x = 220,660.90
  5. Step 5: Solve for x
    x = 220,660.90/503.95
  6. Step 6: Final answer
    x = 437.87

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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.