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Finding the Fourth Proportional to 388,855.70, 582,117.15 and 365,786.90

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Solution

The fourth proportional to 388,855.70, 582,117.15 and 365,786.90 is: 547,583.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,855.70 : 582,117.15 = 365,786.90 : x
  2. Step 2: Convert to fraction form
    388,855.70/582,117.15 = 365,786.90/x
  3. Step 3: Cross multiply
    388,855.70x = 582,117.15 × 365,786.90
  4. Step 4: Simplify right side
    388,855.70x = 212,930,827,735.34
  5. Step 5: Solve for x
    x = 212,930,827,735.34/388,855.70
  6. Step 6: Final answer
    x = 547,583.15

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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.