Home / 385,987,976.12-532,667,521.78-209,775,980.59

Finding the Fourth Proportional to 385,987,976.12, 532,667,521.78 and 209,775,980.59

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Solution

The fourth proportional to 385,987,976.12, 532,667,521.78 and 209,775,980.59 is: 289,493,089.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,987,976.12 : 532,667,521.78 = 209,775,980.59 : x
  2. Step 2: Convert to fraction form
    385,987,976.12/532,667,521.78 = 209,775,980.59/x
  3. Step 3: Cross multiply
    385,987,976.12x = 532,667,521.78 × 209,775,980.59
  4. Step 4: Simplify right side
    385,987,976.12x = 111,740,851,707,988,576
  5. Step 5: Solve for x
    x = 111,740,851,707,988,576/385,987,976.12
  6. Step 6: Final answer
    x = 289,493,089.48

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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.