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Finding the Fourth Proportional to 434.80, 650.58 and 429.94

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Solution

The fourth proportional to 434.80, 650.58 and 429.94 is: 643.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.80 : 650.58 = 429.94 : x
  2. Step 2: Convert to fraction form
    434.80/650.58 = 429.94/x
  3. Step 3: Cross multiply
    434.80x = 650.58 × 429.94
  4. Step 4: Simplify right side
    434.80x = 279,710.37
  5. Step 5: Solve for x
    x = 279,710.37/434.80
  6. Step 6: Final answer
    x = 643.31

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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.