Home / 3,390.24-4,678.56-1,898.40

Finding the Fourth Proportional to 3,390.24, 4,678.56 and 1,898.40

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Solution

The fourth proportional to 3,390.24, 4,678.56 and 1,898.40 is: 2,619.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.24 : 4,678.56 = 1,898.40 : x
  2. Step 2: Convert to fraction form
    3,390.24/4,678.56 = 1,898.40/x
  3. Step 3: Cross multiply
    3,390.24x = 4,678.56 × 1,898.40
  4. Step 4: Simplify right side
    3,390.24x = 8,881,778.30
  5. Step 5: Solve for x
    x = 8,881,778.30/3,390.24
  6. Step 6: Final answer
    x = 2,619.81

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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.