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Finding the Fourth Proportional to 910.18, 1,256.62 and 627.06

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Solution

The fourth proportional to 910.18, 1,256.62 and 627.06 is: 865.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.18 : 1,256.62 = 627.06 : x
  2. Step 2: Convert to fraction form
    910.18/1,256.62 = 627.06/x
  3. Step 3: Cross multiply
    910.18x = 1,256.62 × 627.06
  4. Step 4: Simplify right side
    910.18x = 787,976.14
  5. Step 5: Solve for x
    x = 787,976.14/910.18
  6. Step 6: Final answer
    x = 865.74

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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.