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Finding the Fourth Proportional to 889.59, 1,225.35 and 627.15

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Solution

The fourth proportional to 889.59, 1,225.35 and 627.15 is: 863.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.59 : 1,225.35 = 627.15 : x
  2. Step 2: Convert to fraction form
    889.59/1,225.35 = 627.15/x
  3. Step 3: Cross multiply
    889.59x = 1,225.35 × 627.15
  4. Step 4: Simplify right side
    889.59x = 768,478.25
  5. Step 5: Solve for x
    x = 768,478.25/889.59
  6. Step 6: Final answer
    x = 863.86

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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.