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Finding the Fourth Proportional to 385,000.20, 576,844.20 and 328,575.60

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Solution

The fourth proportional to 385,000.20, 576,844.20 and 328,575.60 is: 492,303.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,000.20 : 576,844.20 = 328,575.60 : x
  2. Step 2: Convert to fraction form
    385,000.20/576,844.20 = 328,575.60/x
  3. Step 3: Cross multiply
    385,000.20x = 576,844.20 × 328,575.60
  4. Step 4: Simplify right side
    385,000.20x = 189,536,929,121.52
  5. Step 5: Solve for x
    x = 189,536,929,121.52/385,000.20
  6. Step 6: Final answer
    x = 492,303.46

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1.5x scale

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.