Home / 1,398.90-2,097.68-1,289.46

Finding the Fourth Proportional to 1,398.90, 2,097.68 and 1,289.46

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Solution

The fourth proportional to 1,398.90, 2,097.68 and 1,289.46 is: 1,933.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.90 : 2,097.68 = 1,289.46 : x
  2. Step 2: Convert to fraction form
    1,398.90/2,097.68 = 1,289.46/x
  3. Step 3: Cross multiply
    1,398.90x = 2,097.68 × 1,289.46
  4. Step 4: Simplify right side
    1,398.90x = 2,704,874.45
  5. Step 5: Solve for x
    x = 2,704,874.45/1,398.90
  6. Step 6: Final answer
    x = 1,933.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.