Home / 3,390.32-4,678.24-1,898.20

Finding the Fourth Proportional to 3,390.32, 4,678.24 and 1,898.20

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Solution

The fourth proportional to 3,390.32, 4,678.24 and 1,898.20 is: 2,619.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.32 : 4,678.24 = 1,898.20 : x
  2. Step 2: Convert to fraction form
    3,390.32/4,678.24 = 1,898.20/x
  3. Step 3: Cross multiply
    3,390.32x = 4,678.24 × 1,898.20
  4. Step 4: Simplify right side
    3,390.32x = 8,880,235.17
  5. Step 5: Solve for x
    x = 8,880,235.17/3,390.32
  6. Step 6: Final answer
    x = 2,619.29

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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.