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Finding the Fourth Proportional to 1,207.04, 1,665.72 and 668.70

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Solution

The fourth proportional to 1,207.04, 1,665.72 and 668.70 is: 922.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.04 : 1,665.72 = 668.70 : x
  2. Step 2: Convert to fraction form
    1,207.04/1,665.72 = 668.70/x
  3. Step 3: Cross multiply
    1,207.04x = 1,665.72 × 668.70
  4. Step 4: Simplify right side
    1,207.04x = 1,113,866.96
  5. Step 5: Solve for x
    x = 1,113,866.96/1,207.04
  6. Step 6: Final answer
    x = 922.81

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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.