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Finding the Fourth Proportional to 1,207.77, 1,812.39 and 660.07

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Solution

The fourth proportional to 1,207.77, 1,812.39 and 660.07 is: 990.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.77 : 1,812.39 = 660.07 : x
  2. Step 2: Convert to fraction form
    1,207.77/1,812.39 = 660.07/x
  3. Step 3: Cross multiply
    1,207.77x = 1,812.39 × 660.07
  4. Step 4: Simplify right side
    1,207.77x = 1,196,304.27
  5. Step 5: Solve for x
    x = 1,196,304.27/1,207.77
  6. Step 6: Final answer
    x = 990.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.