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Finding the Fourth Proportional to 654.30, 980.10 and 434.22

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Solution

The fourth proportional to 654.30, 980.10 and 434.22 is: 650.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.30 : 980.10 = 434.22 : x
  2. Step 2: Convert to fraction form
    654.30/980.10 = 434.22/x
  3. Step 3: Cross multiply
    654.30x = 980.10 × 434.22
  4. Step 4: Simplify right side
    654.30x = 425,579.02
  5. Step 5: Solve for x
    x = 425,579.02/654.30
  6. Step 6: Final answer
    x = 650.43

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1.5x scale

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.