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Finding the Fourth Proportional to 426,490.89, 639,737.16 and 110,947.29

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Solution

The fourth proportional to 426,490.89, 639,737.16 and 110,947.29 is: 166,421.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,490.89 : 639,737.16 = 110,947.29 : x
  2. Step 2: Convert to fraction form
    426,490.89/639,737.16 = 110,947.29/x
  3. Step 3: Cross multiply
    426,490.89x = 639,737.16 × 110,947.29
  4. Step 4: Simplify right side
    426,490.89x = 70,977,104,214.30
  5. Step 5: Solve for x
    x = 70,977,104,214.30/426,490.89
  6. Step 6: Final answer
    x = 166,421.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.