Home / 2,379.49-3,569.70-1,686.40

Finding the Fourth Proportional to 2,379.49, 3,569.70 and 1,686.40

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Solution

The fourth proportional to 2,379.49, 3,569.70 and 1,686.40 is: 2,529.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,379.49 : 3,569.70 = 1,686.40 : x
  2. Step 2: Convert to fraction form
    2,379.49/3,569.70 = 1,686.40/x
  3. Step 3: Cross multiply
    2,379.49x = 3,569.70 × 1,686.40
  4. Step 4: Simplify right side
    2,379.49x = 6,019,942.08
  5. Step 5: Solve for x
    x = 6,019,942.08/2,379.49
  6. Step 6: Final answer
    x = 2,529.93

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1.5x scale

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.