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Finding the Fourth Proportional to 638,279.76, 957,443.94 and 238,878.48

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Solution

The fourth proportional to 638,279.76, 957,443.94 and 238,878.48 is: 358,326.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,279.76 : 957,443.94 = 238,878.48 : x
  2. Step 2: Convert to fraction form
    638,279.76/957,443.94 = 238,878.48/x
  3. Step 3: Cross multiply
    638,279.76x = 957,443.94 × 238,878.48
  4. Step 4: Simplify right side
    638,279.76x = 228,712,753,072.41
  5. Step 5: Solve for x
    x = 228,712,753,072.41/638,279.76
  6. Step 6: Final answer
    x = 358,326.81

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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.