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Finding the Fourth Proportional to 775.58, 1,163.03 and 558.25

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Solution

The fourth proportional to 775.58, 1,163.03 and 558.25 is: 837.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.58 : 1,163.03 = 558.25 : x
  2. Step 2: Convert to fraction form
    775.58/1,163.03 = 558.25/x
  3. Step 3: Cross multiply
    775.58x = 1,163.03 × 558.25
  4. Step 4: Simplify right side
    775.58x = 649,261.50
  5. Step 5: Solve for x
    x = 649,261.50/775.58
  6. Step 6: Final answer
    x = 837.13

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.