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Finding the Fourth Proportional to 430.10, 643.94 and 299.24

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Solution

The fourth proportional to 430.10, 643.94 and 299.24 is: 448.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.10 : 643.94 = 299.24 : x
  2. Step 2: Convert to fraction form
    430.10/643.94 = 299.24/x
  3. Step 3: Cross multiply
    430.10x = 643.94 × 299.24
  4. Step 4: Simplify right side
    430.10x = 192,692.61
  5. Step 5: Solve for x
    x = 192,692.61/430.10
  6. Step 6: Final answer
    x = 448.02

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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.