Home / 1,345.18-2,017.60-371.20

Finding the Fourth Proportional to 1,345.18, 2,017.60 and 371.20

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Solution

The fourth proportional to 1,345.18, 2,017.60 and 371.20 is: 556.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.18 : 2,017.60 = 371.20 : x
  2. Step 2: Convert to fraction form
    1,345.18/2,017.60 = 371.20/x
  3. Step 3: Cross multiply
    1,345.18x = 2,017.60 × 371.20
  4. Step 4: Simplify right side
    1,345.18x = 748,933.12
  5. Step 5: Solve for x
    x = 748,933.12/1,345.18
  6. Step 6: Final answer
    x = 556.75

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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.