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Finding the Fourth Proportional to 378,798.67, 522,831.63 and 217,747.15

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Solution

The fourth proportional to 378,798.67, 522,831.63 and 217,747.15 is: 300,542.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,798.67 : 522,831.63 = 217,747.15 : x
  2. Step 2: Convert to fraction form
    378,798.67/522,831.63 = 217,747.15/x
  3. Step 3: Cross multiply
    378,798.67x = 522,831.63 × 217,747.15
  4. Step 4: Simplify right side
    378,798.67x = 113,845,097,362.36
  5. Step 5: Solve for x
    x = 113,845,097,362.36/378,798.67
  6. Step 6: Final answer
    x = 300,542.49

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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.