Home / 699,354.12-965,107.27-393,430.69

Finding the Fourth Proportional to 699,354.12, 965,107.27 and 393,430.69

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Solution

The fourth proportional to 699,354.12, 965,107.27 and 393,430.69 is: 542,933.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,354.12 : 965,107.27 = 393,430.69 : x
  2. Step 2: Convert to fraction form
    699,354.12/965,107.27 = 393,430.69/x
  3. Step 3: Cross multiply
    699,354.12x = 965,107.27 × 393,430.69
  4. Step 4: Simplify right side
    699,354.12x = 379,702,819,160.12
  5. Step 5: Solve for x
    x = 379,702,819,160.12/699,354.12
  6. Step 6: Final answer
    x = 542,933.56

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Double scale
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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.