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Finding the Fourth Proportional to 699,290.32, 965,106 and 393,379.54

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Solution

The fourth proportional to 699,290.32, 965,106 and 393,379.54 is: 542,911.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,290.32 : 965,106 = 393,379.54 : x
  2. Step 2: Convert to fraction form
    699,290.32/965,106 = 393,379.54/x
  3. Step 3: Cross multiply
    699,290.32x = 965,106 × 393,379.54
  4. Step 4: Simplify right side
    699,290.32x = 379,652,954,331.24
  5. Step 5: Solve for x
    x = 379,652,954,331.24/699,290.32
  6. Step 6: Final answer
    x = 542,911.78

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1.5x scale

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.