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Finding the Fourth Proportional to 1,069.93, 1,475.76 and 677.22

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Solution

The fourth proportional to 1,069.93, 1,475.76 and 677.22 is: 934.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.93 : 1,475.76 = 677.22 : x
  2. Step 2: Convert to fraction form
    1,069.93/1,475.76 = 677.22/x
  3. Step 3: Cross multiply
    1,069.93x = 1,475.76 × 677.22
  4. Step 4: Simplify right side
    1,069.93x = 999,414.19
  5. Step 5: Solve for x
    x = 999,414.19/1,069.93
  6. Step 6: Final answer
    x = 934.09

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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.