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Finding the Fourth Proportional to 638,287.76, 957,455.94 and 238,886.48

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Solution

The fourth proportional to 638,287.76, 957,455.94 and 238,886.48 is: 358,338.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,287.76 : 957,455.94 = 238,886.48 : x
  2. Step 2: Convert to fraction form
    638,287.76/957,455.94 = 238,886.48/x
  3. Step 3: Cross multiply
    638,287.76x = 957,455.94 × 238,886.48
  4. Step 4: Simplify right side
    638,287.76x = 228,723,279,261.69
  5. Step 5: Solve for x
    x = 228,723,279,261.69/638,287.76
  6. Step 6: Final answer
    x = 358,338.81

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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.