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Finding the Fourth Proportional to 766,947,009.90, 1,150,420,514.85 and 639,401,169.90

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Solution

The fourth proportional to 766,947,009.90, 1,150,420,514.85 and 639,401,169.90 is: 959,101,754.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,947,009.90 : 1,150,420,514.85 = 639,401,169.90 : x
  2. Step 2: Convert to fraction form
    766,947,009.90/1,150,420,514.85 = 639,401,169.90/x
  3. Step 3: Cross multiply
    766,947,009.90x = 1,150,420,514.85 × 639,401,169.90
  4. Step 4: Simplify right side
    766,947,009.90x = 735,580,223,072,050,176
  5. Step 5: Solve for x
    x = 735,580,223,072,050,176/766,947,009.90
  6. Step 6: Final answer
    x = 959,101,754.85

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1.5x scale

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.