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Finding the Fourth Proportional to 1,110.53, 1,671.95 and 981.27

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Solution

The fourth proportional to 1,110.53, 1,671.95 and 981.27 is: 1,477.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.53 : 1,671.95 = 981.27 : x
  2. Step 2: Convert to fraction form
    1,110.53/1,671.95 = 981.27/x
  3. Step 3: Cross multiply
    1,110.53x = 1,671.95 × 981.27
  4. Step 4: Simplify right side
    1,110.53x = 1,640,636.83
  5. Step 5: Solve for x
    x = 1,640,636.83/1,110.53
  6. Step 6: Final answer
    x = 1,477.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.