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Finding the Fourth Proportional to 910.07, 1,260.62 and 891.60

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Solution

The fourth proportional to 910.07, 1,260.62 and 891.60 is: 1,235.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.07 : 1,260.62 = 891.60 : x
  2. Step 2: Convert to fraction form
    910.07/1,260.62 = 891.60/x
  3. Step 3: Cross multiply
    910.07x = 1,260.62 × 891.60
  4. Step 4: Simplify right side
    910.07x = 1,123,964.33
  5. Step 5: Solve for x
    x = 1,123,964.33/910.07
  6. Step 6: Final answer
    x = 1,235.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.