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Finding the Fourth Proportional to 391,438,577.70, 587,157,866.55 and 262,444,068.90

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Solution

The fourth proportional to 391,438,577.70, 587,157,866.55 and 262,444,068.90 is: 393,666,103.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,438,577.70 : 587,157,866.55 = 262,444,068.90 : x
  2. Step 2: Convert to fraction form
    391,438,577.70/587,157,866.55 = 262,444,068.90/x
  3. Step 3: Cross multiply
    391,438,577.70x = 587,157,866.55 × 262,444,068.90
  4. Step 4: Simplify right side
    391,438,577.70x = 154,096,099,584,025,184
  5. Step 5: Solve for x
    x = 154,096,099,584,025,184/391,438,577.70
  6. Step 6: Final answer
    x = 393,666,103.35

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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.