Home / 715,508,321,207.70-987,404,685,999.78-390,346,627,689.60

Finding the Fourth Proportional to 715,508,321,207.70, 987,404,685,999.78 and 390,346,627,689.60

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Solution

The fourth proportional to 715,508,321,207.70, 987,404,685,999.78 and 390,346,627,689.60 is: 538,680,093,467.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,508,321,207.70 : 987,404,685,999.78 = 390,346,627,689.60 : x
  2. Step 2: Convert to fraction form
    715,508,321,207.70/987,404,685,999.78 = 390,346,627,689.60/x
  3. Step 3: Cross multiply
    715,508,321,207.70x = 987,404,685,999.78 × 390,346,627,689.60
  4. Step 4: Simplify right side
    715,508,321,207.70x = 385,430,089,344,922,488,406,016
  5. Step 5: Solve for x
    x = 385,430,089,344,922,488,406,016/715,508,321,207.70
  6. Step 6: Final answer
    x = 538,680,093,467.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.