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Finding the Fourth Proportional to 638,321.76, 957,506.94 and 238,920.48

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Solution

The fourth proportional to 638,321.76, 957,506.94 and 238,920.48 is: 358,389.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,321.76 : 957,506.94 = 238,920.48 : x
  2. Step 2: Convert to fraction form
    638,321.76/957,506.94 = 238,920.48/x
  3. Step 3: Cross multiply
    638,321.76x = 957,506.94 × 238,920.48
  4. Step 4: Simplify right side
    638,321.76x = 228,768,017,708.13
  5. Step 5: Solve for x
    x = 228,768,017,708.13/638,321.76
  6. Step 6: Final answer
    x = 358,389.82

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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.