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Finding the Fourth Proportional to 685,403.70, 945,826.23 and 379,458.60

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Solution

The fourth proportional to 685,403.70, 945,826.23 and 379,458.60 is: 523,635.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,403.70 : 945,826.23 = 379,458.60 : x
  2. Step 2: Convert to fraction form
    685,403.70/945,826.23 = 379,458.60/x
  3. Step 3: Cross multiply
    685,403.70x = 945,826.23 × 379,458.60
  4. Step 4: Simplify right side
    685,403.70x = 358,901,897,079.08
  5. Step 5: Solve for x
    x = 358,901,897,079.08/685,403.70
  6. Step 6: Final answer
    x = 523,635.77

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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.