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Finding the Fourth Proportional to 391,435,300.40, 587,341,907.40 and 276,171,652.40

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Solution

The fourth proportional to 391,435,300.40, 587,341,907.40 and 276,171,652.40 is: 414,390,794.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,435,300.40 : 587,341,907.40 = 276,171,652.40 : x
  2. Step 2: Convert to fraction form
    391,435,300.40/587,341,907.40 = 276,171,652.40/x
  3. Step 3: Cross multiply
    391,435,300.40x = 587,341,907.40 × 276,171,652.40
  4. Step 4: Simplify right side
    391,435,300.40x = 162,207,185,090,425,760
  5. Step 5: Solve for x
    x = 162,207,185,090,425,760/391,435,300.40
  6. Step 6: Final answer
    x = 414,390,794.40

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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.