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Finding the Fourth Proportional to 431.18, 646.65 and 294.20

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Solution

The fourth proportional to 431.18, 646.65 and 294.20 is: 441.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.18 : 646.65 = 294.20 : x
  2. Step 2: Convert to fraction form
    431.18/646.65 = 294.20/x
  3. Step 3: Cross multiply
    431.18x = 646.65 × 294.20
  4. Step 4: Simplify right side
    431.18x = 190,244.43
  5. Step 5: Solve for x
    x = 190,244.43/431.18
  6. Step 6: Final answer
    x = 441.22

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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.