Home / 428,438.23-591,221.90-247,139.30

Finding the Fourth Proportional to 428,438.23, 591,221.90 and 247,139.30

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Solution

The fourth proportional to 428,438.23, 591,221.90 and 247,139.30 is: 341,039.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,438.23 : 591,221.90 = 247,139.30 : x
  2. Step 2: Convert to fraction form
    428,438.23/591,221.90 = 247,139.30/x
  3. Step 3: Cross multiply
    428,438.23x = 591,221.90 × 247,139.30
  4. Step 4: Simplify right side
    428,438.23x = 146,114,168,606.57
  5. Step 5: Solve for x
    x = 146,114,168,606.57/428,438.23
  6. Step 6: Final answer
    x = 341,039.06

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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.