Home / 3,390.23-4,678.97-1,898.51

Finding the Fourth Proportional to 3,390.23, 4,678.97 and 1,898.51

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Solution

The fourth proportional to 3,390.23, 4,678.97 and 1,898.51 is: 2,620.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.23 : 4,678.97 = 1,898.51 : x
  2. Step 2: Convert to fraction form
    3,390.23/4,678.97 = 1,898.51/x
  3. Step 3: Cross multiply
    3,390.23x = 4,678.97 × 1,898.51
  4. Step 4: Simplify right side
    3,390.23x = 8,883,077.93
  5. Step 5: Solve for x
    x = 8,883,077.93/3,390.23
  6. Step 6: Final answer
    x = 2,620.20

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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.