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Finding the Fourth Proportional to 2,420.13, 3,629.52 and 859.94

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Solution

The fourth proportional to 2,420.13, 3,629.52 and 859.94 is: 1,289.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.13 : 3,629.52 = 859.94 : x
  2. Step 2: Convert to fraction form
    2,420.13/3,629.52 = 859.94/x
  3. Step 3: Cross multiply
    2,420.13x = 3,629.52 × 859.94
  4. Step 4: Simplify right side
    2,420.13x = 3,121,151.28
  5. Step 5: Solve for x
    x = 3,121,151.28/2,420.13
  6. Step 6: Final answer
    x = 1,289.66

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1.5x scale

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.