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Finding the Fourth Proportional to 1,010,420, 1,394,379.72 and 557,711.12

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Solution

The fourth proportional to 1,010,420, 1,394,379.72 and 557,711.12 is: 769,641.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010,420 : 1,394,379.72 = 557,711.12 : x
  2. Step 2: Convert to fraction form
    1,010,420/1,394,379.72 = 557,711.12/x
  3. Step 3: Cross multiply
    1,010,420x = 1,394,379.72 × 557,711.12
  4. Step 4: Simplify right side
    1,010,420x = 777,661,075,346.49
  5. Step 5: Solve for x
    x = 777,661,075,346.49/1,010,420
  6. Step 6: Final answer
    x = 769,641.41

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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.