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Finding the Fourth Proportional to 647,334.56, 893,426.92 and 389,472.14

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Solution

The fourth proportional to 647,334.56, 893,426.92 and 389,472.14 is: 537,534.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,334.56 : 893,426.92 = 389,472.14 : x
  2. Step 2: Convert to fraction form
    647,334.56/893,426.92 = 389,472.14/x
  3. Step 3: Cross multiply
    647,334.56x = 893,426.92 × 389,472.14
  4. Step 4: Simplify right side
    647,334.56x = 347,964,890,285.08
  5. Step 5: Solve for x
    x = 347,964,890,285.08/647,334.56
  6. Step 6: Final answer
    x = 537,534.86

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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.