Home / 385,987,977.12-532,667,523.16-209,775,981.59

Finding the Fourth Proportional to 385,987,977.12, 532,667,523.16 and 209,775,981.59

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Solution

The fourth proportional to 385,987,977.12, 532,667,523.16 and 209,775,981.59 is: 289,493,090.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,987,977.12 : 532,667,523.16 = 209,775,981.59 : x
  2. Step 2: Convert to fraction form
    385,987,977.12/532,667,523.16 = 209,775,981.59/x
  3. Step 3: Cross multiply
    385,987,977.12x = 532,667,523.16 × 209,775,981.59
  4. Step 4: Simplify right side
    385,987,977.12x = 111,740,852,532,003,072
  5. Step 5: Solve for x
    x = 111,740,852,532,003,072/385,987,977.12
  6. Step 6: Final answer
    x = 289,493,090.86

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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.