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Finding the Fourth Proportional to 368,692.06, 552,904.16 and 128,738.56

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Solution

The fourth proportional to 368,692.06, 552,904.16 and 128,738.56 is: 193,061.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,692.06 : 552,904.16 = 128,738.56 : x
  2. Step 2: Convert to fraction form
    368,692.06/552,904.16 = 128,738.56/x
  3. Step 3: Cross multiply
    368,692.06x = 552,904.16 × 128,738.56
  4. Step 4: Simplify right side
    368,692.06x = 71,180,085,376.41
  5. Step 5: Solve for x
    x = 71,180,085,376.41/368,692.06
  6. Step 6: Final answer
    x = 193,061.07

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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.