Home / 2,119.79-2,925.29-1,291.79

Finding the Fourth Proportional to 2,119.79, 2,925.29 and 1,291.79

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Solution

The fourth proportional to 2,119.79, 2,925.29 and 1,291.79 is: 1,782.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.79 : 2,925.29 = 1,291.79 : x
  2. Step 2: Convert to fraction form
    2,119.79/2,925.29 = 1,291.79/x
  3. Step 3: Cross multiply
    2,119.79x = 2,925.29 × 1,291.79
  4. Step 4: Simplify right side
    2,119.79x = 3,778,870.91
  5. Step 5: Solve for x
    x = 3,778,870.91/2,119.79
  6. Step 6: Final answer
    x = 1,782.66

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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.