Home / 391,506,739.05-540,289,539.54-212,901,073.34

Finding the Fourth Proportional to 391,506,739.05, 540,289,539.54 and 212,901,073.34

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Solution

The fourth proportional to 391,506,739.05, 540,289,539.54 and 212,901,073.34 is: 293,809,049.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,506,739.05 : 540,289,539.54 = 212,901,073.34 : x
  2. Step 2: Convert to fraction form
    391,506,739.05/540,289,539.54 = 212,901,073.34/x
  3. Step 3: Cross multiply
    391,506,739.05x = 540,289,539.54 × 212,901,073.34
  4. Step 4: Simplify right side
    391,506,739.05x = 115,028,222,879,738,912
  5. Step 5: Solve for x
    x = 115,028,222,879,738,912/391,506,739.05
  6. Step 6: Final answer
    x = 293,809,049.52

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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.