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Finding the Fourth Proportional to 1,022.76, 1,411.65 and 668.07

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Solution

The fourth proportional to 1,022.76, 1,411.65 and 668.07 is: 922.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,022.76 : 1,411.65 = 668.07 : x
  2. Step 2: Convert to fraction form
    1,022.76/1,411.65 = 668.07/x
  3. Step 3: Cross multiply
    1,022.76x = 1,411.65 × 668.07
  4. Step 4: Simplify right side
    1,022.76x = 943,081.02
  5. Step 5: Solve for x
    x = 943,081.02/1,022.76
  6. Step 6: Final answer
    x = 922.09

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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.