Home / 2,421.75-3,342.02-1,317.75

Finding the Fourth Proportional to 2,421.75, 3,342.02 and 1,317.75

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Solution

The fourth proportional to 2,421.75, 3,342.02 and 1,317.75 is: 1,818.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.75 : 3,342.02 = 1,317.75 : x
  2. Step 2: Convert to fraction form
    2,421.75/3,342.02 = 1,317.75/x
  3. Step 3: Cross multiply
    2,421.75x = 3,342.02 × 1,317.75
  4. Step 4: Simplify right side
    2,421.75x = 4,403,940.27
  5. Step 5: Solve for x
    x = 4,403,940.27/2,421.75
  6. Step 6: Final answer
    x = 1,818.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.