Home / 2,160.92-3,240.72-1,420.50

Finding the Fourth Proportional to 2,160.92, 3,240.72 and 1,420.50

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Solution

The fourth proportional to 2,160.92, 3,240.72 and 1,420.50 is: 2,130.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.92 : 3,240.72 = 1,420.50 : x
  2. Step 2: Convert to fraction form
    2,160.92/3,240.72 = 1,420.50/x
  3. Step 3: Cross multiply
    2,160.92x = 3,240.72 × 1,420.50
  4. Step 4: Simplify right side
    2,160.92x = 4,603,442.76
  5. Step 5: Solve for x
    x = 4,603,442.76/2,160.92
  6. Step 6: Final answer
    x = 2,130.32

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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.