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Finding the Fourth Proportional to 901,698, 1,244,382.12 and 499,290

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Solution

The fourth proportional to 901,698, 1,244,382.12 and 499,290 is: 689,041.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    901,698 : 1,244,382.12 = 499,290 : x
  2. Step 2: Convert to fraction form
    901,698/1,244,382.12 = 499,290/x
  3. Step 3: Cross multiply
    901,698x = 1,244,382.12 × 499,290
  4. Step 4: Simplify right side
    901,698x = 621,307,548,694.80
  5. Step 5: Solve for x
    x = 621,307,548,694.80/901,698
  6. Step 6: Final answer
    x = 689,041.73

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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.