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Finding the Fourth Proportional to 385,679.80, 578,519.70 and 273,486.70

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Solution

The fourth proportional to 385,679.80, 578,519.70 and 273,486.70 is: 410,230.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,679.80 : 578,519.70 = 273,486.70 : x
  2. Step 2: Convert to fraction form
    385,679.80/578,519.70 = 273,486.70/x
  3. Step 3: Cross multiply
    385,679.80x = 578,519.70 × 273,486.70
  4. Step 4: Simplify right side
    385,679.80x = 158,217,443,637.99
  5. Step 5: Solve for x
    x = 158,217,443,637.99/385,679.80
  6. Step 6: Final answer
    x = 410,230.05

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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.