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Finding the Fourth Proportional to 384,855.08, 531,100.78 and 215,089.20

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Solution

The fourth proportional to 384,855.08, 531,100.78 and 215,089.20 is: 296,823.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,855.08 : 531,100.78 = 215,089.20 : x
  2. Step 2: Convert to fraction form
    384,855.08/531,100.78 = 215,089.20/x
  3. Step 3: Cross multiply
    384,855.08x = 531,100.78 × 215,089.20
  4. Step 4: Simplify right side
    384,855.08x = 114,234,041,889.58
  5. Step 5: Solve for x
    x = 114,234,041,889.58/384,855.08
  6. Step 6: Final answer
    x = 296,823.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.