Home / 428,211,298,848.30-642,581,145,517.82-198,435,805,149.26

Finding the Fourth Proportional to 428,211,298,848.30, 642,581,145,517.82 and 198,435,805,149.26

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Solution

The fourth proportional to 428,211,298,848.30, 642,581,145,517.82 and 198,435,805,149.26 is: 297,776,138,386.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,211,298,848.30 : 642,581,145,517.82 = 198,435,805,149.26 : x
  2. Step 2: Convert to fraction form
    428,211,298,848.30/642,581,145,517.82 = 198,435,805,149.26/x
  3. Step 3: Cross multiply
    428,211,298,848.30x = 642,581,145,517.82 × 198,435,805,149.26
  4. Step 4: Simplify right side
    428,211,298,848.30x = 127,511,106,984,562,411,962,368
  5. Step 5: Solve for x
    x = 127,511,106,984,562,411,962,368/428,211,298,848.30
  6. Step 6: Final answer
    x = 297,776,138,386.61

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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.