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Finding the Fourth Proportional to 1,379,748.60, 1,904,050.26 and 776,136.60

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Solution

The fourth proportional to 1,379,748.60, 1,904,050.26 and 776,136.60 is: 1,071,066.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379,748.60 : 1,904,050.26 = 776,136.60 : x
  2. Step 2: Convert to fraction form
    1,379,748.60/1,904,050.26 = 776,136.60/x
  3. Step 3: Cross multiply
    1,379,748.60x = 1,904,050.26 × 776,136.60
  4. Step 4: Simplify right side
    1,379,748.60x = 1,477,803,095,025.52
  5. Step 5: Solve for x
    x = 1,477,803,095,025.52/1,379,748.60
  6. Step 6: Final answer
    x = 1,071,066.93

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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.