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Finding the Fourth Proportional to 1,379,975.07, 1,904,365.35 and 768,114.74

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Solution

The fourth proportional to 1,379,975.07, 1,904,365.35 and 768,114.74 is: 1,059,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379,975.07 : 1,904,365.35 = 768,114.74 : x
  2. Step 2: Convert to fraction form
    1,379,975.07/1,904,365.35 = 768,114.74/x
  3. Step 3: Cross multiply
    1,379,975.07x = 1,904,365.35 × 768,114.74
  4. Step 4: Simplify right side
    1,379,975.07x = 1,462,771,095,680.26
  5. Step 5: Solve for x
    x = 1,462,771,095,680.26/1,379,975.07
  6. Step 6: Final answer
    x = 1,059,998.20

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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.