Home / 428,439.23-591,223.28-247,140.30

Finding the Fourth Proportional to 428,439.23, 591,223.28 and 247,140.30

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Solution

The fourth proportional to 428,439.23, 591,223.28 and 247,140.30 is: 341,040.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,439.23 : 591,223.28 = 247,140.30 : x
  2. Step 2: Convert to fraction form
    428,439.23/591,223.28 = 247,140.30/x
  3. Step 3: Cross multiply
    428,439.23x = 591,223.28 × 247,140.30
  4. Step 4: Simplify right side
    428,439.23x = 146,115,098,786.18
  5. Step 5: Solve for x
    x = 146,115,098,786.18/428,439.23
  6. Step 6: Final answer
    x = 341,040.43

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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.