Home / 1,680.10-2,320.74-1,291.92

Finding the Fourth Proportional to 1,680.10, 2,320.74 and 1,291.92

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Solution

The fourth proportional to 1,680.10, 2,320.74 and 1,291.92 is: 1,784.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.10 : 2,320.74 = 1,291.92 : x
  2. Step 2: Convert to fraction form
    1,680.10/2,320.74 = 1,291.92/x
  3. Step 3: Cross multiply
    1,680.10x = 2,320.74 × 1,291.92
  4. Step 4: Simplify right side
    1,680.10x = 2,998,210.42
  5. Step 5: Solve for x
    x = 2,998,210.42/1,680.10
  6. Step 6: Final answer
    x = 1,784.54

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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.