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Finding the Fourth Proportional to 780,000.80, 1,170,039.60 and 406,752.80

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Solution

The fourth proportional to 780,000.80, 1,170,039.60 and 406,752.80 is: 610,149.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,000.80 : 1,170,039.60 = 406,752.80 : x
  2. Step 2: Convert to fraction form
    780,000.80/1,170,039.60 = 406,752.80/x
  3. Step 3: Cross multiply
    780,000.80x = 1,170,039.60 × 406,752.80
  4. Step 4: Simplify right side
    780,000.80x = 475,916,883,410.88
  5. Step 5: Solve for x
    x = 475,916,883,410.88/780,000.80
  6. Step 6: Final answer
    x = 610,149.22

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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.