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Finding the Fourth Proportional to 628,831.76, 867,803.44 and 342,367.60

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Solution

The fourth proportional to 628,831.76, 867,803.44 and 342,367.60 is: 472,475.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,831.76 : 867,803.44 = 342,367.60 : x
  2. Step 2: Convert to fraction form
    628,831.76/867,803.44 = 342,367.60/x
  3. Step 3: Cross multiply
    628,831.76x = 867,803.44 × 342,367.60
  4. Step 4: Simplify right side
    628,831.76x = 297,107,781,024.54
  5. Step 5: Solve for x
    x = 297,107,781,024.54/628,831.76
  6. Step 6: Final answer
    x = 472,475.79

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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.