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Finding the Fourth Proportional to 678,703, 936,692.76 and 392,225.44

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Solution

The fourth proportional to 678,703, 936,692.76 and 392,225.44 is: 541,318.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,703 : 936,692.76 = 392,225.44 : x
  2. Step 2: Convert to fraction form
    678,703/936,692.76 = 392,225.44/x
  3. Step 3: Cross multiply
    678,703x = 936,692.76 × 392,225.44
  4. Step 4: Simplify right side
    678,703x = 367,394,729,935.81
  5. Step 5: Solve for x
    x = 367,394,729,935.81/678,703
  6. Step 6: Final answer
    x = 541,318.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.