Home / 3,390.72-4,678.77-1,898.91

Finding the Fourth Proportional to 3,390.72, 4,678.77 and 1,898.91

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Solution

The fourth proportional to 3,390.72, 4,678.77 and 1,898.91 is: 2,620.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.72 : 4,678.77 = 1,898.91 : x
  2. Step 2: Convert to fraction form
    3,390.72/4,678.77 = 1,898.91/x
  3. Step 3: Cross multiply
    3,390.72x = 4,678.77 × 1,898.91
  4. Step 4: Simplify right side
    3,390.72x = 8,884,563.14
  5. Step 5: Solve for x
    x = 8,884,563.14/3,390.72
  6. Step 6: Final answer
    x = 2,620.26

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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.