Home / 428,160.52-639,636.65-277,170.76

Finding the Fourth Proportional to 428,160.52, 639,636.65 and 277,170.76

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Solution

The fourth proportional to 428,160.52, 639,636.65 and 277,170.76 is: 414,070.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,160.52 : 639,636.65 = 277,170.76 : x
  2. Step 2: Convert to fraction form
    428,160.52/639,636.65 = 277,170.76/x
  3. Step 3: Cross multiply
    428,160.52x = 639,636.65 × 277,170.76
  4. Step 4: Simplify right side
    428,160.52x = 177,288,576,404.35
  5. Step 5: Solve for x
    x = 177,288,576,404.35/428,160.52
  6. Step 6: Final answer
    x = 414,070.35

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1.5x scale

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.