Home / 1,623.88-2,239.50-1,291.76

Finding the Fourth Proportional to 1,623.88, 2,239.50 and 1,291.76

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Solution

The fourth proportional to 1,623.88, 2,239.50 and 1,291.76 is: 1,781.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,623.88 : 2,239.50 = 1,291.76 : x
  2. Step 2: Convert to fraction form
    1,623.88/2,239.50 = 1,291.76/x
  3. Step 3: Cross multiply
    1,623.88x = 2,239.50 × 1,291.76
  4. Step 4: Simplify right side
    1,623.88x = 2,892,896.52
  5. Step 5: Solve for x
    x = 2,892,896.52/1,623.88
  6. Step 6: Final answer
    x = 1,781.47

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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.