Home / 391,378,899.96-540,089,114.64-215,165,617.56

Finding the Fourth Proportional to 391,378,899.96, 540,089,114.64 and 215,165,617.56

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Solution

The fourth proportional to 391,378,899.96, 540,089,114.64 and 215,165,617.56 is: 296,920,983.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,378,899.96 : 540,089,114.64 = 215,165,617.56 : x
  2. Step 2: Convert to fraction form
    391,378,899.96/540,089,114.64 = 215,165,617.56/x
  3. Step 3: Cross multiply
    391,378,899.96x = 540,089,114.64 × 215,165,617.56
  4. Step 4: Simplify right side
    391,378,899.96x = 116,208,607,888,949,232
  5. Step 5: Solve for x
    x = 116,208,607,888,949,232/391,378,899.96
  6. Step 6: Final answer
    x = 296,920,983.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.