Home / 428,431.08-591,099.78-247,118.70

Finding the Fourth Proportional to 428,431.08, 591,099.78 and 247,118.70

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Solution

The fourth proportional to 428,431.08, 591,099.78 and 247,118.70 is: 340,945.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,431.08 : 591,099.78 = 247,118.70 : x
  2. Step 2: Convert to fraction form
    428,431.08/591,099.78 = 247,118.70/x
  3. Step 3: Cross multiply
    428,431.08x = 591,099.78 × 247,118.70
  4. Step 4: Simplify right side
    428,431.08x = 146,071,809,203.89
  5. Step 5: Solve for x
    x = 146,071,809,203.89/428,431.08
  6. Step 6: Final answer
    x = 340,945.87

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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.