Home / 1,721.90-2,376.06-1,191.35

Finding the Fourth Proportional to 1,721.90, 2,376.06 and 1,191.35

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Solution

The fourth proportional to 1,721.90, 2,376.06 and 1,191.35 is: 1,643.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.90 : 2,376.06 = 1,191.35 : x
  2. Step 2: Convert to fraction form
    1,721.90/2,376.06 = 1,191.35/x
  3. Step 3: Cross multiply
    1,721.90x = 2,376.06 × 1,191.35
  4. Step 4: Simplify right side
    1,721.90x = 2,830,719.08
  5. Step 5: Solve for x
    x = 2,830,719.08/1,721.90
  6. Step 6: Final answer
    x = 1,643.95

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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.