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Finding the Fourth Proportional to 391,776,277.80, 587,664,416.70 and 349,449,954.60

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Solution

The fourth proportional to 391,776,277.80, 587,664,416.70 and 349,449,954.60 is: 524,174,931.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,776,277.80 : 587,664,416.70 = 349,449,954.60 : x
  2. Step 2: Convert to fraction form
    391,776,277.80/587,664,416.70 = 349,449,954.60/x
  3. Step 3: Cross multiply
    391,776,277.80x = 587,664,416.70 × 349,449,954.60
  4. Step 4: Simplify right side
    391,776,277.80x = 205,359,303,735,850,528
  5. Step 5: Solve for x
    x = 205,359,303,735,850,528/391,776,277.80
  6. Step 6: Final answer
    x = 524,174,931.90

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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.