Home / 1,688-2,531.73-1,199.57

Finding the Fourth Proportional to 1,688, 2,531.73 and 1,199.57

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Solution

The fourth proportional to 1,688, 2,531.73 and 1,199.57 is: 1,799.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688 : 2,531.73 = 1,199.57 : x
  2. Step 2: Convert to fraction form
    1,688/2,531.73 = 1,199.57/x
  3. Step 3: Cross multiply
    1,688x = 2,531.73 × 1,199.57
  4. Step 4: Simplify right side
    1,688x = 3,036,987.36
  5. Step 5: Solve for x
    x = 3,036,987.36/1,688
  6. Step 6: Final answer
    x = 1,799.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.