Home / 390,906,654.30-586,432,064.97-128,605,974.30

Finding the Fourth Proportional to 390,906,654.30, 586,432,064.97 and 128,605,974.30

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Solution

The fourth proportional to 390,906,654.30, 586,432,064.97 and 128,605,974.30 is: 192,932,676.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,906,654.30 : 586,432,064.97 = 128,605,974.30 : x
  2. Step 2: Convert to fraction form
    390,906,654.30/586,432,064.97 = 128,605,974.30/x
  3. Step 3: Cross multiply
    390,906,654.30x = 586,432,064.97 × 128,605,974.30
  4. Step 4: Simplify right side
    390,906,654.30x = 75,418,667,076,227,760
  5. Step 5: Solve for x
    x = 75,418,667,076,227,760/390,906,654.30
  6. Step 6: Final answer
    x = 192,932,676.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.