Home / 1,430.58-2,139.56-1,245.28

Finding the Fourth Proportional to 1,430.58, 2,139.56 and 1,245.28

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Solution

The fourth proportional to 1,430.58, 2,139.56 and 1,245.28 is: 1,862.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.58 : 2,139.56 = 1,245.28 : x
  2. Step 2: Convert to fraction form
    1,430.58/2,139.56 = 1,245.28/x
  3. Step 3: Cross multiply
    1,430.58x = 2,139.56 × 1,245.28
  4. Step 4: Simplify right side
    1,430.58x = 2,664,351.28
  5. Step 5: Solve for x
    x = 2,664,351.28/1,430.58
  6. Step 6: Final answer
    x = 1,862.43

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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.