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Finding the Fourth Proportional to 407.73, 612.56 and 353.06

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Solution

The fourth proportional to 407.73, 612.56 and 353.06 is: 530.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.73 : 612.56 = 353.06 : x
  2. Step 2: Convert to fraction form
    407.73/612.56 = 353.06/x
  3. Step 3: Cross multiply
    407.73x = 612.56 × 353.06
  4. Step 4: Simplify right side
    407.73x = 216,270.55
  5. Step 5: Solve for x
    x = 216,270.55/407.73
  6. Step 6: Final answer
    x = 530.42

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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.