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Finding the Fourth Proportional to 426,605.50, 640,013.50 and 127,084.92

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Solution

The fourth proportional to 426,605.50, 640,013.50 and 127,084.92 is: 190,658.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,605.50 : 640,013.50 = 127,084.92 : x
  2. Step 2: Convert to fraction form
    426,605.50/640,013.50 = 127,084.92/x
  3. Step 3: Cross multiply
    426,605.50x = 640,013.50 × 127,084.92
  4. Step 4: Simplify right side
    426,605.50x = 81,336,061,246.35
  5. Step 5: Solve for x
    x = 81,336,061,246.35/426,605.50
  6. Step 6: Final answer
    x = 190,658.73

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1.5x scale

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.