Home / 1,421.44-1,961.79-1,359.17

Finding the Fourth Proportional to 1,421.44, 1,961.79 and 1,359.17

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Solution

The fourth proportional to 1,421.44, 1,961.79 and 1,359.17 is: 1,875.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.44 : 1,961.79 = 1,359.17 : x
  2. Step 2: Convert to fraction form
    1,421.44/1,961.79 = 1,359.17/x
  3. Step 3: Cross multiply
    1,421.44x = 1,961.79 × 1,359.17
  4. Step 4: Simplify right side
    1,421.44x = 2,666,398.57
  5. Step 5: Solve for x
    x = 2,666,398.57/1,421.44
  6. Step 6: Final answer
    x = 1,875.85

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1.5x scale

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.