Home / 1,345.20-2,017.89-371.28

Finding the Fourth Proportional to 1,345.20, 2,017.89 and 371.28

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Solution

The fourth proportional to 1,345.20, 2,017.89 and 371.28 is: 556.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.20 : 2,017.89 = 371.28 : x
  2. Step 2: Convert to fraction form
    1,345.20/2,017.89 = 371.28/x
  3. Step 3: Cross multiply
    1,345.20x = 2,017.89 × 371.28
  4. Step 4: Simplify right side
    1,345.20x = 749,202.20
  5. Step 5: Solve for x
    x = 749,202.20/1,345.20
  6. Step 6: Final answer
    x = 556.94

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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.