Home / 1,407.90-1,943.45-1,260.28

Finding the Fourth Proportional to 1,407.90, 1,943.45 and 1,260.28

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Solution

The fourth proportional to 1,407.90, 1,943.45 and 1,260.28 is: 1,739.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.90 : 1,943.45 = 1,260.28 : x
  2. Step 2: Convert to fraction form
    1,407.90/1,943.45 = 1,260.28/x
  3. Step 3: Cross multiply
    1,407.90x = 1,943.45 × 1,260.28
  4. Step 4: Simplify right side
    1,407.90x = 2,449,289.46
  5. Step 5: Solve for x
    x = 2,449,289.46/1,407.90
  6. Step 6: Final answer
    x = 1,739.68

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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.