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Finding the Fourth Proportional to 503.57, 695.34 and 317.36

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Solution

The fourth proportional to 503.57, 695.34 and 317.36 is: 438.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.57 : 695.34 = 317.36 : x
  2. Step 2: Convert to fraction form
    503.57/695.34 = 317.36/x
  3. Step 3: Cross multiply
    503.57x = 695.34 × 317.36
  4. Step 4: Simplify right side
    503.57x = 220,673.10
  5. Step 5: Solve for x
    x = 220,673.10/503.57
  6. Step 6: Final answer
    x = 438.22

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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.