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Finding the Fourth Proportional to 505.62, 697.78 and 358.30

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Solution

The fourth proportional to 505.62, 697.78 and 358.30 is: 494.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.62 : 697.78 = 358.30 : x
  2. Step 2: Convert to fraction form
    505.62/697.78 = 358.30/x
  3. Step 3: Cross multiply
    505.62x = 697.78 × 358.30
  4. Step 4: Simplify right side
    505.62x = 250,014.57
  5. Step 5: Solve for x
    x = 250,014.57/505.62
  6. Step 6: Final answer
    x = 494.47

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.