Home / 428,470.02-642,259.26-143,949.42

Finding the Fourth Proportional to 428,470.02, 642,259.26 and 143,949.42

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Solution

The fourth proportional to 428,470.02, 642,259.26 and 143,949.42 is: 215,774.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,470.02 : 642,259.26 = 143,949.42 : x
  2. Step 2: Convert to fraction form
    428,470.02/642,259.26 = 143,949.42/x
  3. Step 3: Cross multiply
    428,470.02x = 642,259.26 × 143,949.42
  4. Step 4: Simplify right side
    428,470.02x = 92,452,847,966.63
  5. Step 5: Solve for x
    x = 92,452,847,966.63/428,470.02
  6. Step 6: Final answer
    x = 215,774.37

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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.