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Finding the Fourth Proportional to 412,905.80, 619,358.70 and 369,603.20

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Solution

The fourth proportional to 412,905.80, 619,358.70 and 369,603.20 is: 554,404.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,905.80 : 619,358.70 = 369,603.20 : x
  2. Step 2: Convert to fraction form
    412,905.80/619,358.70 = 369,603.20/x
  3. Step 3: Cross multiply
    412,905.80x = 619,358.70 × 369,603.20
  4. Step 4: Simplify right side
    412,905.80x = 228,916,957,467.84
  5. Step 5: Solve for x
    x = 228,916,957,467.84/412,905.80
  6. Step 6: Final answer
    x = 554,404.80

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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.