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Finding the Fourth Proportional to 774.99, 1,067.22 and 578.16

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Solution

The fourth proportional to 774.99, 1,067.22 and 578.16 is: 796.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.99 : 1,067.22 = 578.16 : x
  2. Step 2: Convert to fraction form
    774.99/1,067.22 = 578.16/x
  3. Step 3: Cross multiply
    774.99x = 1,067.22 × 578.16
  4. Step 4: Simplify right side
    774.99x = 617,023.92
  5. Step 5: Solve for x
    x = 617,023.92/774.99
  6. Step 6: Final answer
    x = 796.17

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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.