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Finding the Fourth Proportional to 412,337.49, 618,603.03 and 128,013.53

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Solution

The fourth proportional to 412,337.49, 618,603.03 and 128,013.53 is: 192,050.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,337.49 : 618,603.03 = 128,013.53 : x
  2. Step 2: Convert to fraction form
    412,337.49/618,603.03 = 128,013.53/x
  3. Step 3: Cross multiply
    412,337.49x = 618,603.03 × 128,013.53
  4. Step 4: Simplify right side
    412,337.49x = 79,189,554,445.98
  5. Step 5: Solve for x
    x = 79,189,554,445.98/412,337.49
  6. Step 6: Final answer
    x = 192,050.34

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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.