Home / 2,130.31-3,188.64-1,140.65

Finding the Fourth Proportional to 2,130.31, 3,188.64 and 1,140.65

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Solution

The fourth proportional to 2,130.31, 3,188.64 and 1,140.65 is: 1,707.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.31 : 3,188.64 = 1,140.65 : x
  2. Step 2: Convert to fraction form
    2,130.31/3,188.64 = 1,140.65/x
  3. Step 3: Cross multiply
    2,130.31x = 3,188.64 × 1,140.65
  4. Step 4: Simplify right side
    2,130.31x = 3,637,119.30
  5. Step 5: Solve for x
    x = 3,637,119.30/2,130.31
  6. Step 6: Final answer
    x = 1,707.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.