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Finding the Fourth Proportional to 1,379,867.10, 1,904,213.70 and 776,255.10

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Solution

The fourth proportional to 1,379,867.10, 1,904,213.70 and 776,255.10 is: 1,071,230.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379,867.10 : 1,904,213.70 = 776,255.10 : x
  2. Step 2: Convert to fraction form
    1,379,867.10/1,904,213.70 = 776,255.10/x
  3. Step 3: Cross multiply
    1,379,867.10x = 1,904,213.70 × 776,255.10
  4. Step 4: Simplify right side
    1,379,867.10x = 1,478,155,596,114.87
  5. Step 5: Solve for x
    x = 1,478,155,596,114.87/1,379,867.10
  6. Step 6: Final answer
    x = 1,071,230.41

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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.