Home / 1,420.82-2,116.68-1,368.58

Finding the Fourth Proportional to 1,420.82, 2,116.68 and 1,368.58

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Solution

The fourth proportional to 1,420.82, 2,116.68 and 1,368.58 is: 2,038.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.82 : 2,116.68 = 1,368.58 : x
  2. Step 2: Convert to fraction form
    1,420.82/2,116.68 = 1,368.58/x
  3. Step 3: Cross multiply
    1,420.82x = 2,116.68 × 1,368.58
  4. Step 4: Simplify right side
    1,420.82x = 2,896,845.91
  5. Step 5: Solve for x
    x = 2,896,845.91/1,420.82
  6. Step 6: Final answer
    x = 2,038.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.