Home / 428,720.40-591,657.77-237,729.69

Finding the Fourth Proportional to 428,720.40, 591,657.77 and 237,729.69

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Solution

The fourth proportional to 428,720.40, 591,657.77 and 237,729.69 is: 328,080.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,720.40 : 591,657.77 = 237,729.69 : x
  2. Step 2: Convert to fraction form
    428,720.40/591,657.77 = 237,729.69/x
  3. Step 3: Cross multiply
    428,720.40x = 591,657.77 × 237,729.69
  4. Step 4: Simplify right side
    428,720.40x = 140,654,617,059.54
  5. Step 5: Solve for x
    x = 140,654,617,059.54/428,720.40
  6. Step 6: Final answer
    x = 328,080.07

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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.