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Finding the Fourth Proportional to 669.90, 924.21 and 433.80

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Solution

The fourth proportional to 669.90, 924.21 and 433.80 is: 598.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.90 : 924.21 = 433.80 : x
  2. Step 2: Convert to fraction form
    669.90/924.21 = 433.80/x
  3. Step 3: Cross multiply
    669.90x = 924.21 × 433.80
  4. Step 4: Simplify right side
    669.90x = 400,922.30
  5. Step 5: Solve for x
    x = 400,922.30/669.90
  6. Step 6: Final answer
    x = 598.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.