Home / 278,946,037.68-385,476,434.34-209,210,349.66

Finding the Fourth Proportional to 278,946,037.68, 385,476,434.34 and 209,210,349.66

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Solution

The fourth proportional to 278,946,037.68, 385,476,434.34 and 209,210,349.66 is: 289,108,460.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,946,037.68 : 385,476,434.34 = 209,210,349.66 : x
  2. Step 2: Convert to fraction form
    278,946,037.68/385,476,434.34 = 209,210,349.66/x
  3. Step 3: Cross multiply
    278,946,037.68x = 385,476,434.34 × 209,210,349.66
  4. Step 4: Simplify right side
    278,946,037.68x = 80,645,659,613,961,424
  5. Step 5: Solve for x
    x = 80,645,659,613,961,424/278,946,037.68
  6. Step 6: Final answer
    x = 289,108,460.85

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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.