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Finding the Fourth Proportional to 1,190.01, 1,642.23 and 717.93

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Solution

The fourth proportional to 1,190.01, 1,642.23 and 717.93 is: 990.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.01 : 1,642.23 = 717.93 : x
  2. Step 2: Convert to fraction form
    1,190.01/1,642.23 = 717.93/x
  3. Step 3: Cross multiply
    1,190.01x = 1,642.23 × 717.93
  4. Step 4: Simplify right side
    1,190.01x = 1,179,006.18
  5. Step 5: Solve for x
    x = 1,179,006.18/1,190.01
  6. Step 6: Final answer
    x = 990.75

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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.