Home / 1,345.21-2,017.80-371.31

Finding the Fourth Proportional to 1,345.21, 2,017.80 and 371.31

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Solution

The fourth proportional to 1,345.21, 2,017.80 and 371.31 is: 556.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.21 : 2,017.80 = 371.31 : x
  2. Step 2: Convert to fraction form
    1,345.21/2,017.80 = 371.31/x
  3. Step 3: Cross multiply
    1,345.21x = 2,017.80 × 371.31
  4. Step 4: Simplify right side
    1,345.21x = 749,229.32
  5. Step 5: Solve for x
    x = 749,229.32/1,345.21
  6. Step 6: Final answer
    x = 556.96

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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.