Home / 2,114.40-2,917.80-1,230.15

Finding the Fourth Proportional to 2,114.40, 2,917.80 and 1,230.15

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Solution

The fourth proportional to 2,114.40, 2,917.80 and 1,230.15 is: 1,697.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,114.40 : 2,917.80 = 1,230.15 : x
  2. Step 2: Convert to fraction form
    2,114.40/2,917.80 = 1,230.15/x
  3. Step 3: Cross multiply
    2,114.40x = 2,917.80 × 1,230.15
  4. Step 4: Simplify right side
    2,114.40x = 3,589,331.67
  5. Step 5: Solve for x
    x = 3,589,331.67/2,114.40
  6. Step 6: Final answer
    x = 1,697.57

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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.