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Finding the Fourth Proportional to 691,758.50, 954,641.31 and 389,952.50

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Solution

The fourth proportional to 691,758.50, 954,641.31 and 389,952.50 is: 538,142.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,758.50 : 954,641.31 = 389,952.50 : x
  2. Step 2: Convert to fraction form
    691,758.50/954,641.31 = 389,952.50/x
  3. Step 3: Cross multiply
    691,758.50x = 954,641.31 × 389,952.50
  4. Step 4: Simplify right side
    691,758.50x = 372,264,765,437.78
  5. Step 5: Solve for x
    x = 372,264,765,437.78/691,758.50
  6. Step 6: Final answer
    x = 538,142.67

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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.