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Finding the Fourth Proportional to 318,777.45, 439,912.18 and 173,580.98

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Solution

The fourth proportional to 318,777.45, 439,912.18 and 173,580.98 is: 239,541.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,777.45 : 439,912.18 = 173,580.98 : x
  2. Step 2: Convert to fraction form
    318,777.45/439,912.18 = 173,580.98/x
  3. Step 3: Cross multiply
    318,777.45x = 439,912.18 × 173,580.98
  4. Step 4: Simplify right side
    318,777.45x = 76,360,384,603.46
  5. Step 5: Solve for x
    x = 76,360,384,603.46/318,777.45
  6. Step 6: Final answer
    x = 239,541.36

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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.