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Finding the Fourth Proportional to 426,622.84, 639,934.26 and 127,095.69

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Solution

The fourth proportional to 426,622.84, 639,934.26 and 127,095.69 is: 190,643.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,622.84 : 639,934.26 = 127,095.69 : x
  2. Step 2: Convert to fraction form
    426,622.84/639,934.26 = 127,095.69/x
  3. Step 3: Cross multiply
    426,622.84x = 639,934.26 × 127,095.69
  4. Step 4: Simplify right side
    426,622.84x = 81,332,886,329.34
  5. Step 5: Solve for x
    x = 81,332,886,329.34/426,622.84
  6. Step 6: Final answer
    x = 190,643.54

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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.