Home / 1,420.59-2,128.94-1,073.64

Finding the Fourth Proportional to 1,420.59, 2,128.94 and 1,073.64

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Solution

The fourth proportional to 1,420.59, 2,128.94 and 1,073.64 is: 1,608.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.59 : 2,128.94 = 1,073.64 : x
  2. Step 2: Convert to fraction form
    1,420.59/2,128.94 = 1,073.64/x
  3. Step 3: Cross multiply
    1,420.59x = 2,128.94 × 1,073.64
  4. Step 4: Simplify right side
    1,420.59x = 2,285,715.14
  5. Step 5: Solve for x
    x = 2,285,715.14/1,420.59
  6. Step 6: Final answer
    x = 1,608.99

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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.