Home / 1,398.90-2,098.35-1,368.15

Finding the Fourth Proportional to 1,398.90, 2,098.35 and 1,368.15

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Solution

The fourth proportional to 1,398.90, 2,098.35 and 1,368.15 is: 2,052.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.90 : 2,098.35 = 1,368.15 : x
  2. Step 2: Convert to fraction form
    1,398.90/2,098.35 = 1,368.15/x
  3. Step 3: Cross multiply
    1,398.90x = 2,098.35 × 1,368.15
  4. Step 4: Simplify right side
    1,398.90x = 2,870,840.22
  5. Step 5: Solve for x
    x = 2,870,840.22/1,398.90
  6. Step 6: Final answer
    x = 2,052.21

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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.