Home / 1,320.25-1,980.36-1,240.06

Finding the Fourth Proportional to 1,320.25, 1,980.36 and 1,240.06

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Solution

The fourth proportional to 1,320.25, 1,980.36 and 1,240.06 is: 1,860.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.25 : 1,980.36 = 1,240.06 : x
  2. Step 2: Convert to fraction form
    1,320.25/1,980.36 = 1,240.06/x
  3. Step 3: Cross multiply
    1,320.25x = 1,980.36 × 1,240.06
  4. Step 4: Simplify right side
    1,320.25x = 2,455,765.22
  5. Step 5: Solve for x
    x = 2,455,765.22/1,320.25
  6. Step 6: Final answer
    x = 1,860.08

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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.