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Finding the Fourth Proportional to 2,920.92, 4,029.12 and 1,871.16

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Solution

The fourth proportional to 2,920.92, 4,029.12 and 1,871.16 is: 2,581.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.92 : 4,029.12 = 1,871.16 : x
  2. Step 2: Convert to fraction form
    2,920.92/4,029.12 = 1,871.16/x
  3. Step 3: Cross multiply
    2,920.92x = 4,029.12 × 1,871.16
  4. Step 4: Simplify right side
    2,920.92x = 7,539,128.18
  5. Step 5: Solve for x
    x = 7,539,128.18/2,920.92
  6. Step 6: Final answer
    x = 2,581.08

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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.