Home / 5,320.40-7,980.30-1,622.32

Finding the Fourth Proportional to 5,320.40, 7,980.30 and 1,622.32

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Solution

The fourth proportional to 5,320.40, 7,980.30 and 1,622.32 is: 2,433.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,320.40 : 7,980.30 = 1,622.32 : x
  2. Step 2: Convert to fraction form
    5,320.40/7,980.30 = 1,622.32/x
  3. Step 3: Cross multiply
    5,320.40x = 7,980.30 × 1,622.32
  4. Step 4: Simplify right side
    5,320.40x = 12,946,600.30
  5. Step 5: Solve for x
    x = 12,946,600.30/5,320.40
  6. Step 6: Final answer
    x = 2,433.39

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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.