Home / 1,712.19-2,363.75-1,187.31

Finding the Fourth Proportional to 1,712.19, 2,363.75 and 1,187.31

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Solution

The fourth proportional to 1,712.19, 2,363.75 and 1,187.31 is: 1,639.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,712.19 : 2,363.75 = 1,187.31 : x
  2. Step 2: Convert to fraction form
    1,712.19/2,363.75 = 1,187.31/x
  3. Step 3: Cross multiply
    1,712.19x = 2,363.75 × 1,187.31
  4. Step 4: Simplify right side
    1,712.19x = 2,806,486.26
  5. Step 5: Solve for x
    x = 2,806,486.26/1,712.19
  6. Step 6: Final answer
    x = 1,639.13

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1.5x scale

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.