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Finding the Fourth Proportional to 647,334.31, 893,426.57 and 389,471.89

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Solution

The fourth proportional to 647,334.31, 893,426.57 and 389,471.89 is: 537,534.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,334.31 : 893,426.57 = 389,471.89 : x
  2. Step 2: Convert to fraction form
    647,334.31/893,426.57 = 389,471.89/x
  3. Step 3: Cross multiply
    647,334.31x = 893,426.57 × 389,471.89
  4. Step 4: Simplify right side
    647,334.31x = 347,964,532,073.71
  5. Step 5: Solve for x
    x = 347,964,532,073.71/647,334.31
  6. Step 6: Final answer
    x = 537,534.51

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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.