Home / 1,887.79-2,605.26-1,225.21

Finding the Fourth Proportional to 1,887.79, 2,605.26 and 1,225.21

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Solution

The fourth proportional to 1,887.79, 2,605.26 and 1,225.21 is: 1,690.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,887.79 : 2,605.26 = 1,225.21 : x
  2. Step 2: Convert to fraction form
    1,887.79/2,605.26 = 1,225.21/x
  3. Step 3: Cross multiply
    1,887.79x = 2,605.26 × 1,225.21
  4. Step 4: Simplify right side
    1,887.79x = 3,191,990.60
  5. Step 5: Solve for x
    x = 3,191,990.60/1,887.79
  6. Step 6: Final answer
    x = 1,690.86

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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.