Home / 1,470.08-2,204.40-820.64

Finding the Fourth Proportional to 1,470.08, 2,204.40 and 820.64

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Solution

The fourth proportional to 1,470.08, 2,204.40 and 820.64 is: 1,230.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,470.08 : 2,204.40 = 820.64 : x
  2. Step 2: Convert to fraction form
    1,470.08/2,204.40 = 820.64/x
  3. Step 3: Cross multiply
    1,470.08x = 2,204.40 × 820.64
  4. Step 4: Simplify right side
    1,470.08x = 1,809,018.82
  5. Step 5: Solve for x
    x = 1,809,018.82/1,470.08
  6. Step 6: Final answer
    x = 1,230.56

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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.