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Finding the Fourth Proportional to 425,662.85, 638,475.82 and 105,807.95

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Solution

The fourth proportional to 425,662.85, 638,475.82 and 105,807.95 is: 158,707.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,662.85 : 638,475.82 = 105,807.95 : x
  2. Step 2: Convert to fraction form
    425,662.85/638,475.82 = 105,807.95/x
  3. Step 3: Cross multiply
    425,662.85x = 638,475.82 × 105,807.95
  4. Step 4: Simplify right side
    425,662.85x = 67,555,818,970.44
  5. Step 5: Solve for x
    x = 67,555,818,970.44/425,662.85
  6. Step 6: Final answer
    x = 158,707.34

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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.