Home / 355,236,648.50-490,201,688.60-206,547,220.78

Finding the Fourth Proportional to 355,236,648.50, 490,201,688.60 and 206,547,220.78

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Solution

The fourth proportional to 355,236,648.50, 490,201,688.60 and 206,547,220.78 is: 285,020,694.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,236,648.50 : 490,201,688.60 = 206,547,220.78 : x
  2. Step 2: Convert to fraction form
    355,236,648.50/490,201,688.60 = 206,547,220.78/x
  3. Step 3: Cross multiply
    355,236,648.50x = 490,201,688.60 × 206,547,220.78
  4. Step 4: Simplify right side
    355,236,648.50x = 101,249,796,401,993,008
  5. Step 5: Solve for x
    x = 101,249,796,401,993,008/355,236,648.50
  6. Step 6: Final answer
    x = 285,020,694.88

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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.