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Finding the Fourth Proportional to 351,490.89, 485,056.47 and 190,345.90

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Solution

The fourth proportional to 351,490.89, 485,056.47 and 190,345.90 is: 262,676.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,490.89 : 485,056.47 = 190,345.90 : x
  2. Step 2: Convert to fraction form
    351,490.89/485,056.47 = 190,345.90/x
  3. Step 3: Cross multiply
    351,490.89x = 485,056.47 × 190,345.90
  4. Step 4: Simplify right side
    351,490.89x = 92,328,510,332.97
  5. Step 5: Solve for x
    x = 92,328,510,332.97/351,490.89
  6. Step 6: Final answer
    x = 262,676.82

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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.