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Finding the Fourth Proportional to 3,565.40, 4,920.11 and 1,971.94

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Solution

The fourth proportional to 3,565.40, 4,920.11 and 1,971.94 is: 2,721.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,565.40 : 4,920.11 = 1,971.94 : x
  2. Step 2: Convert to fraction form
    3,565.40/4,920.11 = 1,971.94/x
  3. Step 3: Cross multiply
    3,565.40x = 4,920.11 × 1,971.94
  4. Step 4: Simplify right side
    3,565.40x = 9,702,169.08
  5. Step 5: Solve for x
    x = 9,702,169.08/3,565.40
  6. Step 6: Final answer
    x = 2,721.20

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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.