Home / 3,390.28-4,678.40-1,898.17

Finding the Fourth Proportional to 3,390.28, 4,678.40 and 1,898.17

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Solution

The fourth proportional to 3,390.28, 4,678.40 and 1,898.17 is: 2,619.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.28 : 4,678.40 = 1,898.17 : x
  2. Step 2: Convert to fraction form
    3,390.28/4,678.40 = 1,898.17/x
  3. Step 3: Cross multiply
    3,390.28x = 4,678.40 × 1,898.17
  4. Step 4: Simplify right side
    3,390.28x = 8,880,397.97
  5. Step 5: Solve for x
    x = 8,880,397.97/3,390.28
  6. Step 6: Final answer
    x = 2,619.37

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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.