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Finding the Fourth Proportional to 354.42, 530.08 and 207.82

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Solution

The fourth proportional to 354.42, 530.08 and 207.82 is: 310.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.42 : 530.08 = 207.82 : x
  2. Step 2: Convert to fraction form
    354.42/530.08 = 207.82/x
  3. Step 3: Cross multiply
    354.42x = 530.08 × 207.82
  4. Step 4: Simplify right side
    354.42x = 110,159.38
  5. Step 5: Solve for x
    x = 110,159.38/354.42
  6. Step 6: Final answer
    x = 310.82

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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.