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Finding the Fourth Proportional to 389,005.37, 583,487.39 and 119,133.42

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Solution

The fourth proportional to 389,005.37, 583,487.39 and 119,133.42 is: 178,693.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,005.37 : 583,487.39 = 119,133.42 : x
  2. Step 2: Convert to fraction form
    389,005.37/583,487.39 = 119,133.42/x
  3. Step 3: Cross multiply
    389,005.37x = 583,487.39 × 119,133.42
  4. Step 4: Simplify right side
    389,005.37x = 69,512,847,701.91
  5. Step 5: Solve for x
    x = 69,512,847,701.91/389,005.37
  6. Step 6: Final answer
    x = 178,693.80

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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.