Home / 420,890,389.80-631,036,986.30-190,969,621.80

Finding the Fourth Proportional to 420,890,389.80, 631,036,986.30 and 190,969,621.80

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Solution

The fourth proportional to 420,890,389.80, 631,036,986.30 and 190,969,621.80 is: 286,318,950.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,890,389.80 : 631,036,986.30 = 190,969,621.80 : x
  2. Step 2: Convert to fraction form
    420,890,389.80/631,036,986.30 = 190,969,621.80/x
  3. Step 3: Cross multiply
    420,890,389.80x = 631,036,986.30 × 190,969,621.80
  4. Step 4: Simplify right side
    420,890,389.80x = 120,508,894,615,522,784
  5. Step 5: Solve for x
    x = 120,508,894,615,522,784/420,890,389.80
  6. Step 6: Final answer
    x = 286,318,950.34

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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.