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Finding the Fourth Proportional to 405,607.46, 607,135.56 and 278,503.88

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Solution

The fourth proportional to 405,607.46, 607,135.56 and 278,503.88 is: 416,879.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,607.46 : 607,135.56 = 278,503.88 : x
  2. Step 2: Convert to fraction form
    405,607.46/607,135.56 = 278,503.88/x
  3. Step 3: Cross multiply
    405,607.46x = 607,135.56 × 278,503.88
  4. Step 4: Simplify right side
    405,607.46x = 169,089,609,145.97
  5. Step 5: Solve for x
    x = 169,089,609,145.97/405,607.46
  6. Step 6: Final answer
    x = 416,879.93

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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.