Home / 3,390.10-4,678.11-1,898.14

Finding the Fourth Proportional to 3,390.10, 4,678.11 and 1,898.14

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Solution

The fourth proportional to 3,390.10, 4,678.11 and 1,898.14 is: 2,619.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.10 : 4,678.11 = 1,898.14 : x
  2. Step 2: Convert to fraction form
    3,390.10/4,678.11 = 1,898.14/x
  3. Step 3: Cross multiply
    3,390.10x = 4,678.11 × 1,898.14
  4. Step 4: Simplify right side
    3,390.10x = 8,879,707.72
  5. Step 5: Solve for x
    x = 8,879,707.72/3,390.10
  6. Step 6: Final answer
    x = 2,619.31

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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.