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Finding the Fourth Proportional to 405,544.45, 607,041.19 and 278,440.87

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Solution

The fourth proportional to 405,544.45, 607,041.19 and 278,440.87 is: 416,785.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,544.45 : 607,041.19 = 278,440.87 : x
  2. Step 2: Convert to fraction form
    405,544.45/607,041.19 = 278,440.87/x
  3. Step 3: Cross multiply
    405,544.45x = 607,041.19 × 278,440.87
  4. Step 4: Simplify right side
    405,544.45x = 169,025,077,069.44
  5. Step 5: Solve for x
    x = 169,025,077,069.44/405,544.45
  6. Step 6: Final answer
    x = 416,785.58

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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.