Home / 420,890,390.80-631,036,987.80-190,969,622.80

Finding the Fourth Proportional to 420,890,390.80, 631,036,987.80 and 190,969,622.80

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Solution

The fourth proportional to 420,890,390.80, 631,036,987.80 and 190,969,622.80 is: 286,318,951.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,890,390.80 : 631,036,987.80 = 190,969,622.80 : x
  2. Step 2: Convert to fraction form
    420,890,390.80/631,036,987.80 = 190,969,622.80/x
  3. Step 3: Cross multiply
    420,890,390.80x = 631,036,987.80 × 190,969,622.80
  4. Step 4: Simplify right side
    420,890,390.80x = 120,508,895,533,014,208
  5. Step 5: Solve for x
    x = 120,508,895,533,014,208/420,890,390.80
  6. Step 6: Final answer
    x = 286,318,951.84

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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.