Home / 1,389.15-2,083.77-608.75

Finding the Fourth Proportional to 1,389.15, 2,083.77 and 608.75

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Solution

The fourth proportional to 1,389.15, 2,083.77 and 608.75 is: 913.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.15 : 2,083.77 = 608.75 : x
  2. Step 2: Convert to fraction form
    1,389.15/2,083.77 = 608.75/x
  3. Step 3: Cross multiply
    1,389.15x = 2,083.77 × 608.75
  4. Step 4: Simplify right side
    1,389.15x = 1,268,484.57
  5. Step 5: Solve for x
    x = 1,268,484.57/1,389.15
  6. Step 6: Final answer
    x = 913.14

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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.