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Finding the Fourth Proportional to 1,379,970, 2,069,955 and 382,698

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Solution

The fourth proportional to 1,379,970, 2,069,955 and 382,698 is: 574,047

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379,970 : 2,069,955 = 382,698 : x
  2. Step 2: Convert to fraction form
    1,379,970/2,069,955 = 382,698/x
  3. Step 3: Cross multiply
    1,379,970x = 2,069,955 × 382,698
  4. Step 4: Simplify right side
    1,379,970x = 792,167,638,590
  5. Step 5: Solve for x
    x = 792,167,638,590/1,379,970
  6. Step 6: Final answer
    x = 574,047

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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.