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Finding the Fourth Proportional to 388,994, 583,491 and 126,338

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Solution

The fourth proportional to 388,994, 583,491 and 126,338 is: 189,507

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,994 : 583,491 = 126,338 : x
  2. Step 2: Convert to fraction form
    388,994/583,491 = 126,338/x
  3. Step 3: Cross multiply
    388,994x = 583,491 × 126,338
  4. Step 4: Simplify right side
    388,994x = 73,717,085,958
  5. Step 5: Solve for x
    x = 73,717,085,958/388,994
  6. Step 6: Final answer
    x = 189,507

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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.