Home / 1,684.14-2,319.10-1,211.20

Finding the Fourth Proportional to 1,684.14, 2,319.10 and 1,211.20

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Solution

The fourth proportional to 1,684.14, 2,319.10 and 1,211.20 is: 1,667.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,684.14 : 2,319.10 = 1,211.20 : x
  2. Step 2: Convert to fraction form
    1,684.14/2,319.10 = 1,211.20/x
  3. Step 3: Cross multiply
    1,684.14x = 2,319.10 × 1,211.20
  4. Step 4: Simplify right side
    1,684.14x = 2,808,893.92
  5. Step 5: Solve for x
    x = 2,808,893.92/1,684.14
  6. Step 6: Final answer
    x = 1,667.85

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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.