Home / 431,153,004.80-646,823,985.60-212,907,900.80

Finding the Fourth Proportional to 431,153,004.80, 646,823,985.60 and 212,907,900.80

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Solution

The fourth proportional to 431,153,004.80, 646,823,985.60 and 212,907,900.80 is: 319,408,505.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,153,004.80 : 646,823,985.60 = 212,907,900.80 : x
  2. Step 2: Convert to fraction form
    431,153,004.80/646,823,985.60 = 212,907,900.80/x
  3. Step 3: Cross multiply
    431,153,004.80x = 646,823,985.60 × 212,907,900.80
  4. Step 4: Simplify right side
    431,153,004.80x = 137,713,936,961,185,440
  5. Step 5: Solve for x
    x = 137,713,936,961,185,440/431,153,004.80
  6. Step 6: Final answer
    x = 319,408,505.63

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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.