Home / 428,917.47-642,927.25-144,509.75

Finding the Fourth Proportional to 428,917.47, 642,927.25 and 144,509.75

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Solution

The fourth proportional to 428,917.47, 642,927.25 and 144,509.75 is: 216,613.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,917.47 : 642,927.25 = 144,509.75 : x
  2. Step 2: Convert to fraction form
    428,917.47/642,927.25 = 144,509.75/x
  3. Step 3: Cross multiply
    428,917.47x = 642,927.25 × 144,509.75
  4. Step 4: Simplify right side
    428,917.47x = 92,909,255,542.67
  5. Step 5: Solve for x
    x = 92,909,255,542.67/428,917.47
  6. Step 6: Final answer
    x = 216,613.36

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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.