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Finding the Fourth Proportional to 664.90, 997.80 and 433.23

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Solution

The fourth proportional to 664.90, 997.80 and 433.23 is: 650.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.90 : 997.80 = 433.23 : x
  2. Step 2: Convert to fraction form
    664.90/997.80 = 433.23/x
  3. Step 3: Cross multiply
    664.90x = 997.80 × 433.23
  4. Step 4: Simplify right side
    664.90x = 432,271.91
  5. Step 5: Solve for x
    x = 432,271.91/664.90
  6. Step 6: Final answer
    x = 650.13

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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.