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Finding the Fourth Proportional to 387,366.78, 534,629.70 and 322,733.64

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Solution

The fourth proportional to 387,366.78, 534,629.70 and 322,733.64 is: 445,425.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,366.78 : 534,629.70 = 322,733.64 : x
  2. Step 2: Convert to fraction form
    387,366.78/534,629.70 = 322,733.64/x
  3. Step 3: Cross multiply
    387,366.78x = 534,629.70 × 322,733.64
  4. Step 4: Simplify right side
    387,366.78x = 172,542,989,133.11
  5. Step 5: Solve for x
    x = 172,542,989,133.11/387,366.78
  6. Step 6: Final answer
    x = 445,425.36

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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.