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Finding the Fourth Proportional to 1,092.06, 1,503.75 and 987.87

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Solution

The fourth proportional to 1,092.06, 1,503.75 and 987.87 is: 1,360.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,092.06 : 1,503.75 = 987.87 : x
  2. Step 2: Convert to fraction form
    1,092.06/1,503.75 = 987.87/x
  3. Step 3: Cross multiply
    1,092.06x = 1,503.75 × 987.87
  4. Step 4: Simplify right side
    1,092.06x = 1,485,509.51
  5. Step 5: Solve for x
    x = 1,485,509.51/1,092.06
  6. Step 6: Final answer
    x = 1,360.28

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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.