Home / 393,362,390.78-542,825,872.08-217,146,604.04

Finding the Fourth Proportional to 393,362,390.78, 542,825,872.08 and 217,146,604.04

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Solution

The fourth proportional to 393,362,390.78, 542,825,872.08 and 217,146,604.04 is: 299,654,459.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,362,390.78 : 542,825,872.08 = 217,146,604.04 : x
  2. Step 2: Convert to fraction form
    393,362,390.78/542,825,872.08 = 217,146,604.04/x
  3. Step 3: Cross multiply
    393,362,390.78x = 542,825,872.08 × 217,146,604.04
  4. Step 4: Simplify right side
    393,362,390.78x = 117,872,794,707,223,456
  5. Step 5: Solve for x
    x = 117,872,794,707,223,456/393,362,390.78
  6. Step 6: Final answer
    x = 299,654,459.78

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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.