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Finding the Fourth Proportional to 1,076.83, 1,485.07 and 910.87

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Solution

The fourth proportional to 1,076.83, 1,485.07 and 910.87 is: 1,256.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.83 : 1,485.07 = 910.87 : x
  2. Step 2: Convert to fraction form
    1,076.83/1,485.07 = 910.87/x
  3. Step 3: Cross multiply
    1,076.83x = 1,485.07 × 910.87
  4. Step 4: Simplify right side
    1,076.83x = 1,352,705.71
  5. Step 5: Solve for x
    x = 1,352,705.71/1,076.83
  6. Step 6: Final answer
    x = 1,256.19

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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.