Home / 2,120.74-2,922.51-1,530.16

Finding the Fourth Proportional to 2,120.74, 2,922.51 and 1,530.16

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Solution

The fourth proportional to 2,120.74, 2,922.51 and 1,530.16 is: 2,108.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.74 : 2,922.51 = 1,530.16 : x
  2. Step 2: Convert to fraction form
    2,120.74/2,922.51 = 1,530.16/x
  3. Step 3: Cross multiply
    2,120.74x = 2,922.51 × 1,530.16
  4. Step 4: Simplify right side
    2,120.74x = 4,471,907.90
  5. Step 5: Solve for x
    x = 4,471,907.90/2,120.74
  6. Step 6: Final answer
    x = 2,108.65

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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.