Home / 2,106.10-2,907.62-1,398.88

Finding the Fourth Proportional to 2,106.10, 2,907.62 and 1,398.88

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Solution

The fourth proportional to 2,106.10, 2,907.62 and 1,398.88 is: 1,931.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,106.10 : 2,907.62 = 1,398.88 : x
  2. Step 2: Convert to fraction form
    2,106.10/2,907.62 = 1,398.88/x
  3. Step 3: Cross multiply
    2,106.10x = 2,907.62 × 1,398.88
  4. Step 4: Simplify right side
    2,106.10x = 4,067,411.47
  5. Step 5: Solve for x
    x = 4,067,411.47/2,106.10
  6. Step 6: Final answer
    x = 1,931.25

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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.