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Finding the Fourth Proportional to 236,139.40, 353,978.70 and 211,256.20

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Solution

The fourth proportional to 236,139.40, 353,978.70 and 211,256.20 is: 316,678.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,139.40 : 353,978.70 = 211,256.20 : x
  2. Step 2: Convert to fraction form
    236,139.40/353,978.70 = 211,256.20/x
  3. Step 3: Cross multiply
    236,139.40x = 353,978.70 × 211,256.20
  4. Step 4: Simplify right side
    236,139.40x = 74,780,195,042.94
  5. Step 5: Solve for x
    x = 74,780,195,042.94/236,139.40
  6. Step 6: Final answer
    x = 316,678.18

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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.