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Finding the Fourth Proportional to 388,938, 583,407 and 126,282

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Solution

The fourth proportional to 388,938, 583,407 and 126,282 is: 189,423

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,938 : 583,407 = 126,282 : x
  2. Step 2: Convert to fraction form
    388,938/583,407 = 126,282/x
  3. Step 3: Cross multiply
    388,938x = 583,407 × 126,282
  4. Step 4: Simplify right side
    388,938x = 73,673,802,774
  5. Step 5: Solve for x
    x = 73,673,802,774/388,938
  6. Step 6: Final answer
    x = 189,423

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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.