Home / 431,179,077.30-646,532,419.95-212,348,207.22

Finding the Fourth Proportional to 431,179,077.30, 646,532,419.95 and 212,348,207.22

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Solution

The fourth proportional to 431,179,077.30, 646,532,419.95 and 212,348,207.22 is: 318,405,988.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,179,077.30 : 646,532,419.95 = 212,348,207.22 : x
  2. Step 2: Convert to fraction form
    431,179,077.30/646,532,419.95 = 212,348,207.22/x
  3. Step 3: Cross multiply
    431,179,077.30x = 646,532,419.95 × 212,348,207.22
  4. Step 4: Simplify right side
    431,179,077.30x = 137,290,000,285,990,672
  5. Step 5: Solve for x
    x = 137,290,000,285,990,672/431,179,077.30
  6. Step 6: Final answer
    x = 318,405,988.40

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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.