Home / 1,921.56-2,879.70-1,430.76

Finding the Fourth Proportional to 1,921.56, 2,879.70 and 1,430.76

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Solution

The fourth proportional to 1,921.56, 2,879.70 and 1,430.76 is: 2,144.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.56 : 2,879.70 = 1,430.76 : x
  2. Step 2: Convert to fraction form
    1,921.56/2,879.70 = 1,430.76/x
  3. Step 3: Cross multiply
    1,921.56x = 2,879.70 × 1,430.76
  4. Step 4: Simplify right side
    1,921.56x = 4,120,159.57
  5. Step 5: Solve for x
    x = 4,120,159.57/1,921.56
  6. Step 6: Final answer
    x = 2,144.17

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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.