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Finding the Fourth Proportional to 425,237.47, 637,840.25 and 105,390.39

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Solution

The fourth proportional to 425,237.47, 637,840.25 and 105,390.39 is: 158,081.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,237.47 : 637,840.25 = 105,390.39 : x
  2. Step 2: Convert to fraction form
    425,237.47/637,840.25 = 105,390.39/x
  3. Step 3: Cross multiply
    425,237.47x = 637,840.25 × 105,390.39
  4. Step 4: Simplify right side
    425,237.47x = 67,222,234,965.36
  5. Step 5: Solve for x
    x = 67,222,234,965.36/425,237.47
  6. Step 6: Final answer
    x = 158,081.64

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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.