Home / 428,723.58-643,110.62-144,390.36

Finding the Fourth Proportional to 428,723.58, 643,110.62 and 144,390.36

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Solution

The fourth proportional to 428,723.58, 643,110.62 and 144,390.36 is: 216,594.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,723.58 : 643,110.62 = 144,390.36 : x
  2. Step 2: Convert to fraction form
    428,723.58/643,110.62 = 144,390.36/x
  3. Step 3: Cross multiply
    428,723.58x = 643,110.62 × 144,390.36
  4. Step 4: Simplify right side
    428,723.58x = 92,858,973,219.67
  5. Step 5: Solve for x
    x = 92,858,973,219.67/428,723.58
  6. Step 6: Final answer
    x = 216,594.04

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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.