Home / 827,872,870.98-1,241,172,814.59-428,603,421.69

Finding the Fourth Proportional to 827,872,870.98, 1,241,172,814.59 and 428,603,421.69

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Solution

The fourth proportional to 827,872,870.98, 1,241,172,814.59 and 428,603,421.69 is: 642,575,610.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,872,870.98 : 1,241,172,814.59 = 428,603,421.69 : x
  2. Step 2: Convert to fraction form
    827,872,870.98/1,241,172,814.59 = 428,603,421.69/x
  3. Step 3: Cross multiply
    827,872,870.98x = 1,241,172,814.59 × 428,603,421.69
  4. Step 4: Simplify right side
    827,872,870.98x = 531,970,915,246,582,144
  5. Step 5: Solve for x
    x = 531,970,915,246,582,144/827,872,870.98
  6. Step 6: Final answer
    x = 642,575,610.21

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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.