Home / 428,280.21-591,036.75-246,999.78

Finding the Fourth Proportional to 428,280.21, 591,036.75 and 246,999.78

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Solution

The fourth proportional to 428,280.21, 591,036.75 and 246,999.78 is: 340,865.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,280.21 : 591,036.75 = 246,999.78 : x
  2. Step 2: Convert to fraction form
    428,280.21/591,036.75 = 246,999.78/x
  3. Step 3: Cross multiply
    428,280.21x = 591,036.75 × 246,999.78
  4. Step 4: Simplify right side
    428,280.21x = 145,985,947,221.92
  5. Step 5: Solve for x
    x = 145,985,947,221.92/428,280.21
  6. Step 6: Final answer
    x = 340,865.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.