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Finding the Fourth Proportional to 889.73, 1,228.38 and 575.15

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Solution

The fourth proportional to 889.73, 1,228.38 and 575.15 is: 794.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.73 : 1,228.38 = 575.15 : x
  2. Step 2: Convert to fraction form
    889.73/1,228.38 = 575.15/x
  3. Step 3: Cross multiply
    889.73x = 1,228.38 × 575.15
  4. Step 4: Simplify right side
    889.73x = 706,502.76
  5. Step 5: Solve for x
    x = 706,502.76/889.73
  6. Step 6: Final answer
    x = 794.06

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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.