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Finding the Fourth Proportional to 872,293,978.25, 1,308,452,364.29 and 290,028,223.79

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Solution

The fourth proportional to 872,293,978.25, 1,308,452,364.29 and 290,028,223.79 is: 435,046,125.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,293,978.25 : 1,308,452,364.29 = 290,028,223.79 : x
  2. Step 2: Convert to fraction form
    872,293,978.25/1,308,452,364.29 = 290,028,223.79/x
  3. Step 3: Cross multiply
    872,293,978.25x = 1,308,452,364.29 × 290,028,223.79
  4. Step 4: Simplify right side
    872,293,978.25x = 379,488,115,128,854,720
  5. Step 5: Solve for x
    x = 379,488,115,128,854,720/872,293,978.25
  6. Step 6: Final answer
    x = 435,046,125.03

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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.