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Finding the Fourth Proportional to 388,991.60, 583,505.64 and 189,073.68

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Solution

The fourth proportional to 388,991.60, 583,505.64 and 189,073.68 is: 283,619.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,991.60 : 583,505.64 = 189,073.68 : x
  2. Step 2: Convert to fraction form
    388,991.60/583,505.64 = 189,073.68/x
  3. Step 3: Cross multiply
    388,991.60x = 583,505.64 × 189,073.68
  4. Step 4: Simplify right side
    388,991.60x = 110,325,558,655.56
  5. Step 5: Solve for x
    x = 110,325,558,655.56/388,991.60
  6. Step 6: Final answer
    x = 283,619.39

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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.