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Finding the Fourth Proportional to 425,681.38, 638,503.62 and 105,826.56

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Solution

The fourth proportional to 425,681.38, 638,503.62 and 105,826.56 is: 158,735.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,681.38 : 638,503.62 = 105,826.56 : x
  2. Step 2: Convert to fraction form
    425,681.38/638,503.62 = 105,826.56/x
  3. Step 3: Cross multiply
    425,681.38x = 638,503.62 × 105,826.56
  4. Step 4: Simplify right side
    425,681.38x = 67,570,641,652.15
  5. Step 5: Solve for x
    x = 67,570,641,652.15/425,681.38
  6. Step 6: Final answer
    x = 158,735.25

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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.