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Finding the Fourth Proportional to 578,383.68, 867,725.10 and 338,700

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Solution

The fourth proportional to 578,383.68, 867,725.10 and 338,700 is: 508,137.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,383.68 : 867,725.10 = 338,700 : x
  2. Step 2: Convert to fraction form
    578,383.68/867,725.10 = 338,700/x
  3. Step 3: Cross multiply
    578,383.68x = 867,725.10 × 338,700
  4. Step 4: Simplify right side
    578,383.68x = 293,898,491,370
  5. Step 5: Solve for x
    x = 293,898,491,370/578,383.68
  6. Step 6: Final answer
    x = 508,137.59

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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.