Home / 810,907,725.22-1,215,899,518.47-319,354,805.86

Finding the Fourth Proportional to 810,907,725.22, 1,215,899,518.47 and 319,354,805.86

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Solution

The fourth proportional to 810,907,725.22, 1,215,899,518.47 and 319,354,805.86 is: 478,850,234.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,907,725.22 : 1,215,899,518.47 = 319,354,805.86 : x
  2. Step 2: Convert to fraction form
    810,907,725.22/1,215,899,518.47 = 319,354,805.86/x
  3. Step 3: Cross multiply
    810,907,725.22x = 1,215,899,518.47 × 319,354,805.86
  4. Step 4: Simplify right side
    810,907,725.22x = 388,303,354,666,254,336
  5. Step 5: Solve for x
    x = 388,303,354,666,254,336/810,907,725.22
  6. Step 6: Final answer
    x = 478,850,234.85

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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.