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Finding the Fourth Proportional to 430.88, 646.72 and 268.08

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Solution

The fourth proportional to 430.88, 646.72 and 268.08 is: 402.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.88 : 646.72 = 268.08 : x
  2. Step 2: Convert to fraction form
    430.88/646.72 = 268.08/x
  3. Step 3: Cross multiply
    430.88x = 646.72 × 268.08
  4. Step 4: Simplify right side
    430.88x = 173,372.70
  5. Step 5: Solve for x
    x = 173,372.70/430.88
  6. Step 6: Final answer
    x = 402.37

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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.