Home / 1,515.83-2,273.37-420.14

Finding the Fourth Proportional to 1,515.83, 2,273.37 and 420.14

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Solution

The fourth proportional to 1,515.83, 2,273.37 and 420.14 is: 630.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.83 : 2,273.37 = 420.14 : x
  2. Step 2: Convert to fraction form
    1,515.83/2,273.37 = 420.14/x
  3. Step 3: Cross multiply
    1,515.83x = 2,273.37 × 420.14
  4. Step 4: Simplify right side
    1,515.83x = 955,133.67
  5. Step 5: Solve for x
    x = 955,133.67/1,515.83
  6. Step 6: Final answer
    x = 630.11

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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.