Home / 428,485.64-642,636.30-270,503.24

Finding the Fourth Proportional to 428,485.64, 642,636.30 and 270,503.24

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Solution

The fourth proportional to 428,485.64, 642,636.30 and 270,503.24 is: 405,696.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,485.64 : 642,636.30 = 270,503.24 : x
  2. Step 2: Convert to fraction form
    428,485.64/642,636.30 = 270,503.24/x
  3. Step 3: Cross multiply
    428,485.64x = 642,636.30 × 270,503.24
  4. Step 4: Simplify right side
    428,485.64x = 173,835,201,291.61
  5. Step 5: Solve for x
    x = 173,835,201,291.61/428,485.64
  6. Step 6: Final answer
    x = 405,696.68

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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.