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Finding the Fourth Proportional to 388,640.68, 583,130.44 and 136,102.33

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Solution

The fourth proportional to 388,640.68, 583,130.44 and 136,102.33 is: 204,212.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,640.68 : 583,130.44 = 136,102.33 : x
  2. Step 2: Convert to fraction form
    388,640.68/583,130.44 = 136,102.33/x
  3. Step 3: Cross multiply
    388,640.68x = 583,130.44 × 136,102.33
  4. Step 4: Simplify right side
    388,640.68x = 79,365,409,196.86
  5. Step 5: Solve for x
    x = 79,365,409,196.86/388,640.68
  6. Step 6: Final answer
    x = 204,212.82

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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.