Home / 820,172.80-1,230,259.20-770,309.20

Finding the Fourth Proportional to 820,172.80, 1,230,259.20 and 770,309.20

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Solution

The fourth proportional to 820,172.80, 1,230,259.20 and 770,309.20 is: 1,155,463.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,172.80 : 1,230,259.20 = 770,309.20 : x
  2. Step 2: Convert to fraction form
    820,172.80/1,230,259.20 = 770,309.20/x
  3. Step 3: Cross multiply
    820,172.80x = 1,230,259.20 × 770,309.20
  4. Step 4: Simplify right side
    820,172.80x = 947,679,980,144.64
  5. Step 5: Solve for x
    x = 947,679,980,144.64/820,172.80
  6. Step 6: Final answer
    x = 1,155,463.80

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1.5x scale

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.