Home / 838,799,120.88-1,258,505,488.36-390,316,405.43

Finding the Fourth Proportional to 838,799,120.88, 1,258,505,488.36 and 390,316,405.43

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Solution

The fourth proportional to 838,799,120.88, 1,258,505,488.36 and 390,316,405.43 is: 585,617,373.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    838,799,120.88 : 1,258,505,488.36 = 390,316,405.43 : x
  2. Step 2: Convert to fraction form
    838,799,120.88/1,258,505,488.36 = 390,316,405.43/x
  3. Step 3: Cross multiply
    838,799,120.88x = 1,258,505,488.36 × 390,316,405.43
  4. Step 4: Simplify right side
    838,799,120.88x = 491,215,338,430,601,856
  5. Step 5: Solve for x
    x = 491,215,338,430,601,856/838,799,120.88
  6. Step 6: Final answer
    x = 585,617,373.94

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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.