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Finding the Fourth Proportional to 353.71, 530.56 and 345.61

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Solution

The fourth proportional to 353.71, 530.56 and 345.61 is: 518.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.71 : 530.56 = 345.61 : x
  2. Step 2: Convert to fraction form
    353.71/530.56 = 345.61/x
  3. Step 3: Cross multiply
    353.71x = 530.56 × 345.61
  4. Step 4: Simplify right side
    353.71x = 183,364.19
  5. Step 5: Solve for x
    x = 183,364.19/353.71
  6. Step 6: Final answer
    x = 518.41

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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.