Home / 389,623.10-584,143.05-212,330.30

Finding the Fourth Proportional to 389,623.10, 584,143.05 and 212,330.30

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Solution

The fourth proportional to 389,623.10, 584,143.05 and 212,330.30 is: 318,336.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,623.10 : 584,143.05 = 212,330.30 : x
  2. Step 2: Convert to fraction form
    389,623.10/584,143.05 = 212,330.30/x
  3. Step 3: Cross multiply
    389,623.10x = 584,143.05 × 212,330.30
  4. Step 4: Simplify right side
    389,623.10x = 124,031,269,049.42
  5. Step 5: Solve for x
    x = 124,031,269,049.42/389,623.10
  6. Step 6: Final answer
    x = 318,336.54

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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.