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Finding the Fourth Proportional to 665,121.15, 997,471.52 and 238,647.45

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Solution

The fourth proportional to 665,121.15, 997,471.52 and 238,647.45 is: 357,895.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,121.15 : 997,471.52 = 238,647.45 : x
  2. Step 2: Convert to fraction form
    665,121.15/997,471.52 = 238,647.45/x
  3. Step 3: Cross multiply
    665,121.15x = 997,471.52 × 238,647.45
  4. Step 4: Simplify right side
    665,121.15x = 238,044,029,761.87
  5. Step 5: Solve for x
    x = 238,044,029,761.87/665,121.15
  6. Step 6: Final answer
    x = 357,895.74

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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.