Home / 428,623.24-642,961.59-113,080.45

Finding the Fourth Proportional to 428,623.24, 642,961.59 and 113,080.45

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Solution

The fourth proportional to 428,623.24, 642,961.59 and 113,080.45 is: 169,627.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,623.24 : 642,961.59 = 113,080.45 : x
  2. Step 2: Convert to fraction form
    428,623.24/642,961.59 = 113,080.45/x
  3. Step 3: Cross multiply
    428,623.24x = 642,961.59 × 113,080.45
  4. Step 4: Simplify right side
    428,623.24x = 72,706,384,322.51
  5. Step 5: Solve for x
    x = 72,706,384,322.51/428,623.24
  6. Step 6: Final answer
    x = 169,627.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.