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Finding the Fourth Proportional to 691,750, 954,629.58 and 389,944

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Solution

The fourth proportional to 691,750, 954,629.58 and 389,944 is: 538,130.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,750 : 954,629.58 = 389,944 : x
  2. Step 2: Convert to fraction form
    691,750/954,629.58 = 389,944/x
  3. Step 3: Cross multiply
    691,750x = 954,629.58 × 389,944
  4. Step 4: Simplify right side
    691,750x = 372,252,076,943.52
  5. Step 5: Solve for x
    x = 372,252,076,943.52/691,750
  6. Step 6: Final answer
    x = 538,130.94

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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.