Home / 428,483.36-642,756.96-144,174.56

Finding the Fourth Proportional to 428,483.36, 642,756.96 and 144,174.56

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Solution

The fourth proportional to 428,483.36, 642,756.96 and 144,174.56 is: 216,272.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,483.36 : 642,756.96 = 144,174.56 : x
  2. Step 2: Convert to fraction form
    428,483.36/642,756.96 = 144,174.56/x
  3. Step 3: Cross multiply
    428,483.36x = 642,756.96 × 144,174.56
  4. Step 4: Simplify right side
    428,483.36x = 92,669,201,894.94
  5. Step 5: Solve for x
    x = 92,669,201,894.94/428,483.36
  6. Step 6: Final answer
    x = 216,272.58

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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.