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Finding the Fourth Proportional to 1,395.00, 1,921.93 and 1,079.17

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Solution

The fourth proportional to 1,395.00, 1,921.93 and 1,079.17 is: 1,486.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.00 : 1,921.93 = 1,079.17 : x
  2. Step 2: Convert to fraction form
    1,395.00/1,921.93 = 1,079.17/x
  3. Step 3: Cross multiply
    1,395.00x = 1,921.93 × 1,079.17
  4. Step 4: Simplify right side
    1,395.00x = 2,074,092.51
  5. Step 5: Solve for x
    x = 2,074,092.51/1,395.00
  6. Step 6: Final answer
    x = 1,486.81

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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.