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Finding the Fourth Proportional to 353.45, 530.46 and 339.61

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Solution

The fourth proportional to 353.45, 530.46 and 339.61 is: 509.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.45 : 530.46 = 339.61 : x
  2. Step 2: Convert to fraction form
    353.45/530.46 = 339.61/x
  3. Step 3: Cross multiply
    353.45x = 530.46 × 339.61
  4. Step 4: Simplify right side
    353.45x = 180,150.79
  5. Step 5: Solve for x
    x = 180,150.79/353.45
  6. Step 6: Final answer
    x = 509.69

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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.