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Finding the Fourth Proportional to 699,735.78, 965,620.08 and 389,636.10

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Solution

The fourth proportional to 699,735.78, 965,620.08 and 389,636.10 is: 537,689.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,735.78 : 965,620.08 = 389,636.10 : x
  2. Step 2: Convert to fraction form
    699,735.78/965,620.08 = 389,636.10/x
  3. Step 3: Cross multiply
    699,735.78x = 965,620.08 × 389,636.10
  4. Step 4: Simplify right side
    699,735.78x = 376,240,442,052.89
  5. Step 5: Solve for x
    x = 376,240,442,052.89/699,735.78
  6. Step 6: Final answer
    x = 537,689.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.