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Finding the Fourth Proportional to 355,694,978.76, 490,859,070.68 and 192,903,554.76

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Solution

The fourth proportional to 355,694,978.76, 490,859,070.68 and 192,903,554.76 is: 266,206,905.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,694,978.76 : 490,859,070.68 = 192,903,554.76 : x
  2. Step 2: Convert to fraction form
    355,694,978.76/490,859,070.68 = 192,903,554.76/x
  3. Step 3: Cross multiply
    355,694,978.76x = 490,859,070.68 × 192,903,554.76
  4. Step 4: Simplify right side
    355,694,978.76x = 94,688,459,620,362,080
  5. Step 5: Solve for x
    x = 94,688,459,620,362,080/355,694,978.76
  6. Step 6: Final answer
    x = 266,206,905.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.