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Finding the Fourth Proportional to 1,371.25, 2,053.38 and 907.64

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Solution

The fourth proportional to 1,371.25, 2,053.38 and 907.64 is: 1,359.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.25 : 2,053.38 = 907.64 : x
  2. Step 2: Convert to fraction form
    1,371.25/2,053.38 = 907.64/x
  3. Step 3: Cross multiply
    1,371.25x = 2,053.38 × 907.64
  4. Step 4: Simplify right side
    1,371.25x = 1,863,722.96
  5. Step 5: Solve for x
    x = 1,863,722.96/1,371.25
  6. Step 6: Final answer
    x = 1,359.14

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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.