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Finding the Fourth Proportional to 389,898.58, 584,903.66 and 120,049.55

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Solution

The fourth proportional to 389,898.58, 584,903.66 and 120,049.55 is: 180,091.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,898.58 : 584,903.66 = 120,049.55 : x
  2. Step 2: Convert to fraction form
    389,898.58/584,903.66 = 120,049.55/x
  3. Step 3: Cross multiply
    389,898.58x = 584,903.66 × 120,049.55
  4. Step 4: Simplify right side
    389,898.58x = 70,217,418,199.93
  5. Step 5: Solve for x
    x = 70,217,418,199.93/389,898.58
  6. Step 6: Final answer
    x = 180,091.50

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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.