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Finding the Fourth Proportional to 1,193.93, 1,647.74 and 689.81

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Solution

The fourth proportional to 1,193.93, 1,647.74 and 689.81 is: 952.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.93 : 1,647.74 = 689.81 : x
  2. Step 2: Convert to fraction form
    1,193.93/1,647.74 = 689.81/x
  3. Step 3: Cross multiply
    1,193.93x = 1,647.74 × 689.81
  4. Step 4: Simplify right side
    1,193.93x = 1,136,615.84
  5. Step 5: Solve for x
    x = 1,136,615.84/1,193.93
  6. Step 6: Final answer
    x = 952.00

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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.