Home / 1,515.48-2,272.95-419.60

Finding the Fourth Proportional to 1,515.48, 2,272.95 and 419.60

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Solution

The fourth proportional to 1,515.48, 2,272.95 and 419.60 is: 629.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.48 : 2,272.95 = 419.60 : x
  2. Step 2: Convert to fraction form
    1,515.48/2,272.95 = 419.60/x
  3. Step 3: Cross multiply
    1,515.48x = 2,272.95 × 419.60
  4. Step 4: Simplify right side
    1,515.48x = 953,718.46
  5. Step 5: Solve for x
    x = 953,718.46/1,515.48
  6. Step 6: Final answer
    x = 629.32

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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.