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Finding the Fourth Proportional to 430.88, 641.14 and 429.44

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Solution

The fourth proportional to 430.88, 641.14 and 429.44 is: 639.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.88 : 641.14 = 429.44 : x
  2. Step 2: Convert to fraction form
    430.88/641.14 = 429.44/x
  3. Step 3: Cross multiply
    430.88x = 641.14 × 429.44
  4. Step 4: Simplify right side
    430.88x = 275,331.16
  5. Step 5: Solve for x
    x = 275,331.16/430.88
  6. Step 6: Final answer
    x = 639.00

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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.