Home / 2,220.86-3,064.70-1,312.39

Finding the Fourth Proportional to 2,220.86, 3,064.70 and 1,312.39

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Solution

The fourth proportional to 2,220.86, 3,064.70 and 1,312.39 is: 1,811.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.86 : 3,064.70 = 1,312.39 : x
  2. Step 2: Convert to fraction form
    2,220.86/3,064.70 = 1,312.39/x
  3. Step 3: Cross multiply
    2,220.86x = 3,064.70 × 1,312.39
  4. Step 4: Simplify right side
    2,220.86x = 4,022,059.75
  5. Step 5: Solve for x
    x = 4,022,059.75/2,220.86
  6. Step 6: Final answer
    x = 1,811.04

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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.