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Finding the Fourth Proportional to 368,425.40, 552,638.10 and 131,775.80

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Solution

The fourth proportional to 368,425.40, 552,638.10 and 131,775.80 is: 197,663.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,425.40 : 552,638.10 = 131,775.80 : x
  2. Step 2: Convert to fraction form
    368,425.40/552,638.10 = 131,775.80/x
  3. Step 3: Cross multiply
    368,425.40x = 552,638.10 × 131,775.80
  4. Step 4: Simplify right side
    368,425.40x = 72,824,327,737.98
  5. Step 5: Solve for x
    x = 72,824,327,737.98/368,425.40
  6. Step 6: Final answer
    x = 197,663.70

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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.