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Finding the Fourth Proportional to 780,138.98, 1,093,669.13 and 780,138.98

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Solution

The fourth proportional to 780,138.98, 1,093,669.13 and 780,138.98 is: 1,093,669.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,138.98 : 1,093,669.13 = 780,138.98 : x
  2. Step 2: Convert to fraction form
    780,138.98/1,093,669.13 = 780,138.98/x
  3. Step 3: Cross multiply
    780,138.98x = 1,093,669.13 × 780,138.98
  4. Step 4: Simplify right side
    780,138.98x = 853,213,910,166.65
  5. Step 5: Solve for x
    x = 853,213,910,166.65/780,138.98
  6. Step 6: Final answer
    x = 1,093,669.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.