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Finding the Fourth Proportional to 318,655.26, 478,065.92 and 118,977.30

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Solution

The fourth proportional to 318,655.26, 478,065.92 and 118,977.30 is: 178,496.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,655.26 : 478,065.92 = 118,977.30 : x
  2. Step 2: Convert to fraction form
    318,655.26/478,065.92 = 118,977.30/x
  3. Step 3: Cross multiply
    318,655.26x = 478,065.92 × 118,977.30
  4. Step 4: Simplify right side
    318,655.26x = 56,878,991,788.73
  5. Step 5: Solve for x
    x = 56,878,991,788.73/318,655.26
  6. Step 6: Final answer
    x = 178,496.95

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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.