Home / 1,921.10-2,881.50-750.89

Finding the Fourth Proportional to 1,921.10, 2,881.50 and 750.89

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Solution

The fourth proportional to 1,921.10, 2,881.50 and 750.89 is: 1,126.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.10 : 2,881.50 = 750.89 : x
  2. Step 2: Convert to fraction form
    1,921.10/2,881.50 = 750.89/x
  3. Step 3: Cross multiply
    1,921.10x = 2,881.50 × 750.89
  4. Step 4: Simplify right side
    1,921.10x = 2,163,675.13
  5. Step 5: Solve for x
    x = 2,163,675.13/1,921.10
  6. Step 6: Final answer
    x = 1,126.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.