Home / 787,889,978.91-1,181,963,402.37-242,631,512.91

Finding the Fourth Proportional to 787,889,978.91, 1,181,963,402.37 and 242,631,512.91

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Solution

The fourth proportional to 787,889,978.91, 1,181,963,402.37 and 242,631,512.91 is: 363,986,820.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,889,978.91 : 1,181,963,402.37 = 242,631,512.91 : x
  2. Step 2: Convert to fraction form
    787,889,978.91/1,181,963,402.37 = 242,631,512.91/x
  3. Step 3: Cross multiply
    787,889,978.91x = 1,181,963,402.37 × 242,631,512.91
  4. Step 4: Simplify right side
    787,889,978.91x = 286,781,568,521,284,160
  5. Step 5: Solve for x
    x = 286,781,568,521,284,160/787,889,978.91
  6. Step 6: Final answer
    x = 363,986,820.75

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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.