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Finding the Fourth Proportional to 2,908.61, 4,006.13 and 2,779.01

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Solution

The fourth proportional to 2,908.61, 4,006.13 and 2,779.01 is: 3,827.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,908.61 : 4,006.13 = 2,779.01 : x
  2. Step 2: Convert to fraction form
    2,908.61/4,006.13 = 2,779.01/x
  3. Step 3: Cross multiply
    2,908.61x = 4,006.13 × 2,779.01
  4. Step 4: Simplify right side
    2,908.61x = 11,133,061.44
  5. Step 5: Solve for x
    x = 11,133,061.44/2,908.61
  6. Step 6: Final answer
    x = 3,827.62

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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.