Home / 685,221,873.96-1,027,711,313.13-311,642,256.20

Finding the Fourth Proportional to 685,221,873.96, 1,027,711,313.13 and 311,642,256.20

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Solution

The fourth proportional to 685,221,873.96, 1,027,711,313.13 and 311,642,256.20 is: 467,408,126.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,221,873.96 : 1,027,711,313.13 = 311,642,256.20 : x
  2. Step 2: Convert to fraction form
    685,221,873.96/1,027,711,313.13 = 311,642,256.20/x
  3. Step 3: Cross multiply
    685,221,873.96x = 1,027,711,313.13 × 311,642,256.20
  4. Step 4: Simplify right side
    685,221,873.96x = 320,278,272,346,097,856
  5. Step 5: Solve for x
    x = 320,278,272,346,097,856/685,221,873.96
  6. Step 6: Final answer
    x = 467,408,126.50

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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.