Home / 3,390.37-4,678.70-1,898.63

Finding the Fourth Proportional to 3,390.37, 4,678.70 and 1,898.63

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Solution

The fourth proportional to 3,390.37, 4,678.70 and 1,898.63 is: 2,620.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.37 : 4,678.70 = 1,898.63 : x
  2. Step 2: Convert to fraction form
    3,390.37/4,678.70 = 1,898.63/x
  3. Step 3: Cross multiply
    3,390.37x = 4,678.70 × 1,898.63
  4. Step 4: Simplify right side
    3,390.37x = 8,883,148.96
  5. Step 5: Solve for x
    x = 8,883,148.96/3,390.37
  6. Step 6: Final answer
    x = 2,620.11

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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.