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Finding the Fourth Proportional to 503.55, 695.30 and 356.39

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Solution

The fourth proportional to 503.55, 695.30 and 356.39 is: 492.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.55 : 695.30 = 356.39 : x
  2. Step 2: Convert to fraction form
    503.55/695.30 = 356.39/x
  3. Step 3: Cross multiply
    503.55x = 695.30 × 356.39
  4. Step 4: Simplify right side
    503.55x = 247,797.97
  5. Step 5: Solve for x
    x = 247,797.97/503.55
  6. Step 6: Final answer
    x = 492.10

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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.