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Finding the Fourth Proportional to 666,494.80, 999,742.20 and 427,346.35

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Solution

The fourth proportional to 666,494.80, 999,742.20 and 427,346.35 is: 641,019.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,494.80 : 999,742.20 = 427,346.35 : x
  2. Step 2: Convert to fraction form
    666,494.80/999,742.20 = 427,346.35/x
  3. Step 3: Cross multiply
    666,494.80x = 999,742.20 × 427,346.35
  4. Step 4: Simplify right side
    666,494.80x = 427,236,180,110.97
  5. Step 5: Solve for x
    x = 427,236,180,110.97/666,494.80
  6. Step 6: Final answer
    x = 641,019.53

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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.