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Finding the Fourth Proportional to 388,926, 583,389 and 126,270

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Solution

The fourth proportional to 388,926, 583,389 and 126,270 is: 189,405

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,926 : 583,389 = 126,270 : x
  2. Step 2: Convert to fraction form
    388,926/583,389 = 126,270/x
  3. Step 3: Cross multiply
    388,926x = 583,389 × 126,270
  4. Step 4: Simplify right side
    388,926x = 73,664,529,030
  5. Step 5: Solve for x
    x = 73,664,529,030/388,926
  6. Step 6: Final answer
    x = 189,405

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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.