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Finding the Fourth Proportional to 1,229.32, 1,696.46 and 669.80

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Solution

The fourth proportional to 1,229.32, 1,696.46 and 669.80 is: 924.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.32 : 1,696.46 = 669.80 : x
  2. Step 2: Convert to fraction form
    1,229.32/1,696.46 = 669.80/x
  3. Step 3: Cross multiply
    1,229.32x = 1,696.46 × 669.80
  4. Step 4: Simplify right side
    1,229.32x = 1,136,288.91
  5. Step 5: Solve for x
    x = 1,136,288.91/1,229.32
  6. Step 6: Final answer
    x = 924.32

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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.