Home / 1,207.58-1,668.47-947.57

Finding the Fourth Proportional to 1,207.58, 1,668.47 and 947.57

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Solution

The fourth proportional to 1,207.58, 1,668.47 and 947.57 is: 1,309.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.58 : 1,668.47 = 947.57 : x
  2. Step 2: Convert to fraction form
    1,207.58/1,668.47 = 947.57/x
  3. Step 3: Cross multiply
    1,207.58x = 1,668.47 × 947.57
  4. Step 4: Simplify right side
    1,207.58x = 1,580,979.04
  5. Step 5: Solve for x
    x = 1,580,979.04/1,207.58
  6. Step 6: Final answer
    x = 1,309.22

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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.