Home / 3,211.18-4,430.79-1,813.90

Finding the Fourth Proportional to 3,211.18, 4,430.79 and 1,813.90

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Solution

The fourth proportional to 3,211.18, 4,430.79 and 1,813.90 is: 2,502.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.18 : 4,430.79 = 1,813.90 : x
  2. Step 2: Convert to fraction form
    3,211.18/4,430.79 = 1,813.90/x
  3. Step 3: Cross multiply
    3,211.18x = 4,430.79 × 1,813.90
  4. Step 4: Simplify right side
    3,211.18x = 8,037,009.98
  5. Step 5: Solve for x
    x = 8,037,009.98/3,211.18
  6. Step 6: Final answer
    x = 2,502.82

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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.