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Finding the Fourth Proportional to 561,419.19, 842,571.09 and 261,745.50

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Solution

The fourth proportional to 561,419.19, 842,571.09 and 261,745.50 is: 392,824.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,419.19 : 842,571.09 = 261,745.50 : x
  2. Step 2: Convert to fraction form
    561,419.19/842,571.09 = 261,745.50/x
  3. Step 3: Cross multiply
    561,419.19x = 842,571.09 × 261,745.50
  4. Step 4: Simplify right side
    561,419.19x = 220,539,191,237.60
  5. Step 5: Solve for x
    x = 220,539,191,237.60/561,419.19
  6. Step 6: Final answer
    x = 392,824.46

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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.