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Finding the Fourth Proportional to 775.77, 1,069.50 and 554.33

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Solution

The fourth proportional to 775.77, 1,069.50 and 554.33 is: 764.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.77 : 1,069.50 = 554.33 : x
  2. Step 2: Convert to fraction form
    775.77/1,069.50 = 554.33/x
  3. Step 3: Cross multiply
    775.77x = 1,069.50 × 554.33
  4. Step 4: Simplify right side
    775.77x = 592,860.69
  5. Step 5: Solve for x
    x = 592,860.69/775.77
  6. Step 6: Final answer
    x = 764.23

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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.