Home / 3,390.56-4,678.98-1,898.47

Finding the Fourth Proportional to 3,390.56, 4,678.98 and 1,898.47

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Solution

The fourth proportional to 3,390.56, 4,678.98 and 1,898.47 is: 2,619.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.56 : 4,678.98 = 1,898.47 : x
  2. Step 2: Convert to fraction form
    3,390.56/4,678.98 = 1,898.47/x
  3. Step 3: Cross multiply
    3,390.56x = 4,678.98 × 1,898.47
  4. Step 4: Simplify right side
    3,390.56x = 8,882,903.16
  5. Step 5: Solve for x
    x = 8,882,903.16/3,390.56
  6. Step 6: Final answer
    x = 2,619.89

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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.