Home / 515,079.09-772,831.22-278,142.75

Finding the Fourth Proportional to 515,079.09, 772,831.22 and 278,142.75

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Solution

The fourth proportional to 515,079.09, 772,831.22 and 278,142.75 is: 417,328.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,079.09 : 772,831.22 = 278,142.75 : x
  2. Step 2: Convert to fraction form
    515,079.09/772,831.22 = 278,142.75/x
  3. Step 3: Cross multiply
    515,079.09x = 772,831.22 × 278,142.75
  4. Step 4: Simplify right side
    515,079.09x = 214,957,399,425.94
  5. Step 5: Solve for x
    x = 214,957,399,425.94/515,079.09
  6. Step 6: Final answer
    x = 417,328.92

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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.