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Finding the Fourth Proportional to 910.30, 1,256.91 and 700.15

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Solution

The fourth proportional to 910.30, 1,256.91 and 700.15 is: 966.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.30 : 1,256.91 = 700.15 : x
  2. Step 2: Convert to fraction form
    910.30/1,256.91 = 700.15/x
  3. Step 3: Cross multiply
    910.30x = 1,256.91 × 700.15
  4. Step 4: Simplify right side
    910.30x = 880,025.54
  5. Step 5: Solve for x
    x = 880,025.54/910.30
  6. Step 6: Final answer
    x = 966.74

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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.