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Finding the Fourth Proportional to 775.72, 1,069.44 and 554.29

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Solution

The fourth proportional to 775.72, 1,069.44 and 554.29 is: 764.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.72 : 1,069.44 = 554.29 : x
  2. Step 2: Convert to fraction form
    775.72/1,069.44 = 554.29/x
  3. Step 3: Cross multiply
    775.72x = 1,069.44 × 554.29
  4. Step 4: Simplify right side
    775.72x = 592,777.22
  5. Step 5: Solve for x
    x = 592,777.22/775.72
  6. Step 6: Final answer
    x = 764.17

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Double scale
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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.