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Finding the Fourth Proportional to 380.53, 570.39 and 340.03

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Solution

The fourth proportional to 380.53, 570.39 and 340.03 is: 509.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.53 : 570.39 = 340.03 : x
  2. Step 2: Convert to fraction form
    380.53/570.39 = 340.03/x
  3. Step 3: Cross multiply
    380.53x = 570.39 × 340.03
  4. Step 4: Simplify right side
    380.53x = 193,949.71
  5. Step 5: Solve for x
    x = 193,949.71/380.53
  6. Step 6: Final answer
    x = 509.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.