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Finding the Fourth Proportional to 690,031.72, 952,234.02 and 388,225

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Solution

The fourth proportional to 690,031.72, 952,234.02 and 388,225 is: 535,745.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,031.72 : 952,234.02 = 388,225 : x
  2. Step 2: Convert to fraction form
    690,031.72/952,234.02 = 388,225/x
  3. Step 3: Cross multiply
    690,031.72x = 952,234.02 × 388,225
  4. Step 4: Simplify right side
    690,031.72x = 369,681,052,414.50
  5. Step 5: Solve for x
    x = 369,681,052,414.50/690,031.72
  6. Step 6: Final answer
    x = 535,745.01

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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.