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Finding the Fourth Proportional to 691,758, 954,640.62 and 389,952

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Solution

The fourth proportional to 691,758, 954,640.62 and 389,952 is: 538,141.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,758 : 954,640.62 = 389,952 : x
  2. Step 2: Convert to fraction form
    691,758/954,640.62 = 389,952/x
  3. Step 3: Cross multiply
    691,758x = 954,640.62 × 389,952
  4. Step 4: Simplify right side
    691,758x = 372,264,019,050.24
  5. Step 5: Solve for x
    x = 372,264,019,050.24/691,758
  6. Step 6: Final answer
    x = 538,141.98

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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.