Home / 278,946,037.31-385,476,433.82-209,210,349.29

Finding the Fourth Proportional to 278,946,037.31, 385,476,433.82 and 209,210,349.29

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Solution

The fourth proportional to 278,946,037.31, 385,476,433.82 and 209,210,349.29 is: 289,108,460.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,946,037.31 : 385,476,433.82 = 209,210,349.29 : x
  2. Step 2: Convert to fraction form
    278,946,037.31/385,476,433.82 = 209,210,349.29/x
  3. Step 3: Cross multiply
    278,946,037.31x = 385,476,433.82 × 209,210,349.29
  4. Step 4: Simplify right side
    278,946,037.31x = 80,645,659,360,944,752
  5. Step 5: Solve for x
    x = 80,645,659,360,944,752/278,946,037.31
  6. Step 6: Final answer
    x = 289,108,460.33

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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.