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Finding the Fourth Proportional to 351.42, 529.51 and 291.89

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Solution

The fourth proportional to 351.42, 529.51 and 291.89 is: 439.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.42 : 529.51 = 291.89 : x
  2. Step 2: Convert to fraction form
    351.42/529.51 = 291.89/x
  3. Step 3: Cross multiply
    351.42x = 529.51 × 291.89
  4. Step 4: Simplify right side
    351.42x = 154,554.57
  5. Step 5: Solve for x
    x = 154,554.57/351.42
  6. Step 6: Final answer
    x = 439.80

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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.