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Finding the Fourth Proportional to 351.68, 530.08 and 330.72

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Solution

The fourth proportional to 351.68, 530.08 and 330.72 is: 498.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.68 : 530.08 = 330.72 : x
  2. Step 2: Convert to fraction form
    351.68/530.08 = 330.72/x
  3. Step 3: Cross multiply
    351.68x = 530.08 × 330.72
  4. Step 4: Simplify right side
    351.68x = 175,308.06
  5. Step 5: Solve for x
    x = 175,308.06/351.68
  6. Step 6: Final answer
    x = 498.49

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.