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Finding the Fourth Proportional to 661,327.81, 991,161.63 and 357,709.84

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Solution

The fourth proportional to 661,327.81, 991,161.63 and 357,709.84 is: 536,115.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,327.81 : 991,161.63 = 357,709.84 : x
  2. Step 2: Convert to fraction form
    661,327.81/991,161.63 = 357,709.84/x
  3. Step 3: Cross multiply
    661,327.81x = 991,161.63 × 357,709.84
  4. Step 4: Simplify right side
    661,327.81x = 354,548,265,603.54
  5. Step 5: Solve for x
    x = 354,548,265,603.54/661,327.81
  6. Step 6: Final answer
    x = 536,115.77

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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.