Home / 428,680.10-642,888.80-296,410.34

Finding the Fourth Proportional to 428,680.10, 642,888.80 and 296,410.34

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Solution

The fourth proportional to 428,680.10, 642,888.80 and 296,410.34 is: 444,524.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,680.10 : 642,888.80 = 296,410.34 : x
  2. Step 2: Convert to fraction form
    428,680.10/642,888.80 = 296,410.34/x
  3. Step 3: Cross multiply
    428,680.10x = 642,888.80 × 296,410.34
  4. Step 4: Simplify right side
    428,680.10x = 190,558,887,790.19
  5. Step 5: Solve for x
    x = 190,558,887,790.19/428,680.10
  6. Step 6: Final answer
    x = 444,524.69

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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.