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Finding the Fourth Proportional to 1,229.59, 1,696.79 and 670.05

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Solution

The fourth proportional to 1,229.59, 1,696.79 and 670.05 is: 924.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.59 : 1,696.79 = 670.05 : x
  2. Step 2: Convert to fraction form
    1,229.59/1,696.79 = 670.05/x
  3. Step 3: Cross multiply
    1,229.59x = 1,696.79 × 670.05
  4. Step 4: Simplify right side
    1,229.59x = 1,136,927.36
  5. Step 5: Solve for x
    x = 1,136,927.36/1,229.59
  6. Step 6: Final answer
    x = 924.64

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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.