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Finding the Fourth Proportional to 309,658.06, 427,336.68 and 188,771.68

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Solution

The fourth proportional to 309,658.06, 427,336.68 and 188,771.68 is: 260,510.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,658.06 : 427,336.68 = 188,771.68 : x
  2. Step 2: Convert to fraction form
    309,658.06/427,336.68 = 188,771.68/x
  3. Step 3: Cross multiply
    309,658.06x = 427,336.68 × 188,771.68
  4. Step 4: Simplify right side
    309,658.06x = 80,669,063,009.22
  5. Step 5: Solve for x
    x = 80,669,063,009.22/309,658.06
  6. Step 6: Final answer
    x = 260,510.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.