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Finding the Fourth Proportional to 428,048.62, 638,295.53 and 424,204.85

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Solution

The fourth proportional to 428,048.62, 638,295.53 and 424,204.85 is: 632,563.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,048.62 : 638,295.53 = 424,204.85 : x
  2. Step 2: Convert to fraction form
    428,048.62/638,295.53 = 424,204.85/x
  3. Step 3: Cross multiply
    428,048.62x = 638,295.53 × 424,204.85
  4. Step 4: Simplify right side
    428,048.62x = 270,768,059,034.04
  5. Step 5: Solve for x
    x = 270,768,059,034.04/428,048.62
  6. Step 6: Final answer
    x = 632,563.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.