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Finding the Fourth Proportional to 318,511.58, 477,606.18 and 141,072.98

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Solution

The fourth proportional to 318,511.58, 477,606.18 and 141,072.98 is: 211,538.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,511.58 : 477,606.18 = 141,072.98 : x
  2. Step 2: Convert to fraction form
    318,511.58/477,606.18 = 141,072.98/x
  3. Step 3: Cross multiply
    318,511.58x = 477,606.18 × 141,072.98
  4. Step 4: Simplify right side
    318,511.58x = 67,377,327,079.02
  5. Step 5: Solve for x
    x = 67,377,327,079.02/318,511.58
  6. Step 6: Final answer
    x = 211,538.08

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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.