Home / 1,298.32-1,947.42-713.60

Finding the Fourth Proportional to 1,298.32, 1,947.42 and 713.60

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Solution

The fourth proportional to 1,298.32, 1,947.42 and 713.60 is: 1,070.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.32 : 1,947.42 = 713.60 : x
  2. Step 2: Convert to fraction form
    1,298.32/1,947.42 = 713.60/x
  3. Step 3: Cross multiply
    1,298.32x = 1,947.42 × 713.60
  4. Step 4: Simplify right side
    1,298.32x = 1,389,669.17
  5. Step 5: Solve for x
    x = 1,389,669.17/1,298.32
  6. Step 6: Final answer
    x = 1,070.36

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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.