Home / 2,108.88-2,908.92-1,312.65

Finding the Fourth Proportional to 2,108.88, 2,908.92 and 1,312.65

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Solution

The fourth proportional to 2,108.88, 2,908.92 and 1,312.65 is: 1,810.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.88 : 2,908.92 = 1,312.65 : x
  2. Step 2: Convert to fraction form
    2,108.88/2,908.92 = 1,312.65/x
  3. Step 3: Cross multiply
    2,108.88x = 2,908.92 × 1,312.65
  4. Step 4: Simplify right side
    2,108.88x = 3,818,393.84
  5. Step 5: Solve for x
    x = 3,818,393.84/2,108.88
  6. Step 6: Final answer
    x = 1,810.63

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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.