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Finding the Fourth Proportional to 919,978.80, 1,379,968.20 and 470,550.30

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Solution

The fourth proportional to 919,978.80, 1,379,968.20 and 470,550.30 is: 705,825.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,978.80 : 1,379,968.20 = 470,550.30 : x
  2. Step 2: Convert to fraction form
    919,978.80/1,379,968.20 = 470,550.30/x
  3. Step 3: Cross multiply
    919,978.80x = 1,379,968.20 × 470,550.30
  4. Step 4: Simplify right side
    919,978.80x = 649,344,450,500.46
  5. Step 5: Solve for x
    x = 649,344,450,500.46/919,978.80
  6. Step 6: Final answer
    x = 705,825.45

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Similar ratio
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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.