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Finding the Fourth Proportional to 919,477.60, 1,379,216.40 and 853,122.40

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Solution

The fourth proportional to 919,477.60, 1,379,216.40 and 853,122.40 is: 1,279,683.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,477.60 : 1,379,216.40 = 853,122.40 : x
  2. Step 2: Convert to fraction form
    919,477.60/1,379,216.40 = 853,122.40/x
  3. Step 3: Cross multiply
    919,477.60x = 1,379,216.40 × 853,122.40
  4. Step 4: Simplify right side
    919,477.60x = 1,176,640,405,287.36
  5. Step 5: Solve for x
    x = 1,176,640,405,287.36/919,477.60
  6. Step 6: Final answer
    x = 1,279,683.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.