Home / 809,420.78-1,214,134.85-210,339.52

Finding the Fourth Proportional to 809,420.78, 1,214,134.85 and 210,339.52

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Solution

The fourth proportional to 809,420.78, 1,214,134.85 and 210,339.52 is: 315,510.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,420.78 : 1,214,134.85 = 210,339.52 : x
  2. Step 2: Convert to fraction form
    809,420.78/1,214,134.85 = 210,339.52/x
  3. Step 3: Cross multiply
    809,420.78x = 1,214,134.85 × 210,339.52
  4. Step 4: Simplify right side
    809,420.78x = 255,380,534,441.90
  5. Step 5: Solve for x
    x = 255,380,534,441.90/809,420.78
  6. Step 6: Final answer
    x = 315,510.23

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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.