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Finding the Fourth Proportional to 493,680.94, 740,546.78 and 138,722.63

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Solution

The fourth proportional to 493,680.94, 740,546.78 and 138,722.63 is: 208,091.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,680.94 : 740,546.78 = 138,722.63 : x
  2. Step 2: Convert to fraction form
    493,680.94/740,546.78 = 138,722.63/x
  3. Step 3: Cross multiply
    493,680.94x = 740,546.78 × 138,722.63
  4. Step 4: Simplify right side
    493,680.94x = 102,730,596,959.63
  5. Step 5: Solve for x
    x = 102,730,596,959.63/493,680.94
  6. Step 6: Final answer
    x = 208,091.07

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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.