Home / 431,569,342.10-646,928,860.35-213,253,379.30

Finding the Fourth Proportional to 431,569,342.10, 646,928,860.35 and 213,253,379.30

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Solution

The fourth proportional to 431,569,342.10, 646,928,860.35 and 213,253,379.30 is: 319,669,986.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,569,342.10 : 646,928,860.35 = 213,253,379.30 : x
  2. Step 2: Convert to fraction form
    431,569,342.10/646,928,860.35 = 213,253,379.30/x
  3. Step 3: Cross multiply
    431,569,342.10x = 646,928,860.35 × 213,253,379.30
  4. Step 4: Simplify right side
    431,569,342.10x = 137,959,765,636,335,296
  5. Step 5: Solve for x
    x = 137,959,765,636,335,296/431,569,342.10
  6. Step 6: Final answer
    x = 319,669,986.21

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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.