Home / 315,285.12-435,270.24-218,629.44

Finding the Fourth Proportional to 315,285.12, 435,270.24 and 218,629.44

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Solution

The fourth proportional to 315,285.12, 435,270.24 and 218,629.44 is: 301,831.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,285.12 : 435,270.24 = 218,629.44 : x
  2. Step 2: Convert to fraction form
    315,285.12/435,270.24 = 218,629.44/x
  3. Step 3: Cross multiply
    315,285.12x = 435,270.24 × 218,629.44
  4. Step 4: Simplify right side
    315,285.12x = 95,162,888,819.87
  5. Step 5: Solve for x
    x = 95,162,888,819.87/315,285.12
  6. Step 6: Final answer
    x = 301,831.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.