Home / 428,561.08-642,779.65-300,087.59

Finding the Fourth Proportional to 428,561.08, 642,779.65 and 300,087.59

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Solution

The fourth proportional to 428,561.08, 642,779.65 and 300,087.59 is: 450,087.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,561.08 : 642,779.65 = 300,087.59 : x
  2. Step 2: Convert to fraction form
    428,561.08/642,779.65 = 300,087.59/x
  3. Step 3: Cross multiply
    428,561.08x = 642,779.65 × 300,087.59
  4. Step 4: Simplify right side
    428,561.08x = 192,890,193,230.76
  5. Step 5: Solve for x
    x = 192,890,193,230.76/428,561.08
  6. Step 6: Final answer
    x = 450,087.99

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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.