Home / 428,623.20-642,934.71-144,289.89

Finding the Fourth Proportional to 428,623.20, 642,934.71 and 144,289.89

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Solution

The fourth proportional to 428,623.20, 642,934.71 and 144,289.89 is: 216,434.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,623.20 : 642,934.71 = 144,289.89 : x
  2. Step 2: Convert to fraction form
    428,623.20/642,934.71 = 144,289.89/x
  3. Step 3: Cross multiply
    428,623.20x = 642,934.71 × 144,289.89
  4. Step 4: Simplify right side
    428,623.20x = 92,768,978,583.08
  5. Step 5: Solve for x
    x = 92,768,978,583.08/428,623.20
  6. Step 6: Final answer
    x = 216,434.80

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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.