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Finding the Fourth Proportional to 662,940, 994,319.28 and 189,666.72

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Solution

The fourth proportional to 662,940, 994,319.28 and 189,666.72 is: 284,474.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,940 : 994,319.28 = 189,666.72 : x
  2. Step 2: Convert to fraction form
    662,940/994,319.28 = 189,666.72/x
  3. Step 3: Cross multiply
    662,940x = 994,319.28 × 189,666.72
  4. Step 4: Simplify right side
    662,940x = 188,589,276,470.36
  5. Step 5: Solve for x
    x = 188,589,276,470.36/662,940
  6. Step 6: Final answer
    x = 284,474.13

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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.