Home / 1,974.40-2,725.28-1,385.08

Finding the Fourth Proportional to 1,974.40, 2,725.28 and 1,385.08

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Solution

The fourth proportional to 1,974.40, 2,725.28 and 1,385.08 is: 1,911.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,974.40 : 2,725.28 = 1,385.08 : x
  2. Step 2: Convert to fraction form
    1,974.40/2,725.28 = 1,385.08/x
  3. Step 3: Cross multiply
    1,974.40x = 2,725.28 × 1,385.08
  4. Step 4: Simplify right side
    1,974.40x = 3,774,730.82
  5. Step 5: Solve for x
    x = 3,774,730.82/1,974.40
  6. Step 6: Final answer
    x = 1,911.84

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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.