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Finding the Fourth Proportional to 2,641.72, 3,645.66 and 1,813.72

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Solution

The fourth proportional to 2,641.72, 3,645.66 and 1,813.72 is: 2,502.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,641.72 : 3,645.66 = 1,813.72 : x
  2. Step 2: Convert to fraction form
    2,641.72/3,645.66 = 1,813.72/x
  3. Step 3: Cross multiply
    2,641.72x = 3,645.66 × 1,813.72
  4. Step 4: Simplify right side
    2,641.72x = 6,612,206.46
  5. Step 5: Solve for x
    x = 6,612,206.46/2,641.72
  6. Step 6: Final answer
    x = 2,502.99

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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.