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Finding the Fourth Proportional to 443.01, 658.54 and 429.89

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Solution

The fourth proportional to 443.01, 658.54 and 429.89 is: 639.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.01 : 658.54 = 429.89 : x
  2. Step 2: Convert to fraction form
    443.01/658.54 = 429.89/x
  3. Step 3: Cross multiply
    443.01x = 658.54 × 429.89
  4. Step 4: Simplify right side
    443.01x = 283,095.39
  5. Step 5: Solve for x
    x = 283,095.39/443.01
  6. Step 6: Final answer
    x = 639.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.