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Finding the Fourth Proportional to 260,658.42, 389,370.34 and 189,012.30

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Solution

The fourth proportional to 260,658.42, 389,370.34 and 189,012.30 is: 282,345.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,658.42 : 389,370.34 = 189,012.30 : x
  2. Step 2: Convert to fraction form
    260,658.42/389,370.34 = 189,012.30/x
  3. Step 3: Cross multiply
    260,658.42x = 389,370.34 × 189,012.30
  4. Step 4: Simplify right side
    260,658.42x = 73,595,783,515.18
  5. Step 5: Solve for x
    x = 73,595,783,515.18/260,658.42
  6. Step 6: Final answer
    x = 282,345.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.