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Finding the Fourth Proportional to 405,922.40, 609,056.40 and 256,277.60

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Solution

The fourth proportional to 405,922.40, 609,056.40 and 256,277.60 is: 384,525.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,922.40 : 609,056.40 = 256,277.60 : x
  2. Step 2: Convert to fraction form
    405,922.40/609,056.40 = 256,277.60/x
  3. Step 3: Cross multiply
    405,922.40x = 609,056.40 × 256,277.60
  4. Step 4: Simplify right side
    405,922.40x = 156,087,512,456.64
  5. Step 5: Solve for x
    x = 156,087,512,456.64/405,922.40
  6. Step 6: Final answer
    x = 384,525.50

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1.5x scale

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.