Home / 428,615.04-642,888.96-162,351.36

Finding the Fourth Proportional to 428,615.04, 642,888.96 and 162,351.36

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Solution

The fourth proportional to 428,615.04, 642,888.96 and 162,351.36 is: 243,514.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,615.04 : 642,888.96 = 162,351.36 : x
  2. Step 2: Convert to fraction form
    428,615.04/642,888.96 = 162,351.36/x
  3. Step 3: Cross multiply
    428,615.04x = 642,888.96 × 162,351.36
  4. Step 4: Simplify right side
    428,615.04x = 104,373,896,984.99
  5. Step 5: Solve for x
    x = 104,373,896,984.99/428,615.04
  6. Step 6: Final answer
    x = 243,514.31

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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.