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Finding the Fourth Proportional to 309,808.18, 464,675.37 and 85,191.40

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Solution

The fourth proportional to 309,808.18, 464,675.37 and 85,191.40 is: 127,776.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,808.18 : 464,675.37 = 85,191.40 : x
  2. Step 2: Convert to fraction form
    309,808.18/464,675.37 = 85,191.40/x
  3. Step 3: Cross multiply
    309,808.18x = 464,675.37 × 85,191.40
  4. Step 4: Simplify right side
    309,808.18x = 39,586,345,315.82
  5. Step 5: Solve for x
    x = 39,586,345,315.82/309,808.18
  6. Step 6: Final answer
    x = 127,776.95

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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.