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Finding the Fourth Proportional to 351,438.66, 485,056.89 and 238,297.86

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Solution

The fourth proportional to 351,438.66, 485,056.89 and 238,297.86 is: 328,899.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,438.66 : 485,056.89 = 238,297.86 : x
  2. Step 2: Convert to fraction form
    351,438.66/485,056.89 = 238,297.86/x
  3. Step 3: Cross multiply
    351,438.66x = 485,056.89 × 238,297.86
  4. Step 4: Simplify right side
    351,438.66x = 115,588,018,865.26
  5. Step 5: Solve for x
    x = 115,588,018,865.26/351,438.66
  6. Step 6: Final answer
    x = 328,899.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.