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Finding the Fourth Proportional to 255,878.74, 383,019.42 and 188,486.76

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Solution

The fourth proportional to 255,878.74, 383,019.42 and 188,486.76 is: 282,141.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,878.74 : 383,019.42 = 188,486.76 : x
  2. Step 2: Convert to fraction form
    255,878.74/383,019.42 = 188,486.76/x
  3. Step 3: Cross multiply
    255,878.74x = 383,019.42 × 188,486.76
  4. Step 4: Simplify right side
    255,878.74x = 72,194,089,492.88
  5. Step 5: Solve for x
    x = 72,194,089,492.88/255,878.74
  6. Step 6: Final answer
    x = 282,141.80

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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.