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Finding the Fourth Proportional to 685,263.60, 945,649.86 and 379,340.16

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Solution

The fourth proportional to 685,263.60, 945,649.86 and 379,340.16 is: 523,481.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,263.60 : 945,649.86 = 379,340.16 : x
  2. Step 2: Convert to fraction form
    685,263.60/945,649.86 = 379,340.16/x
  3. Step 3: Cross multiply
    685,263.60x = 945,649.86 × 379,340.16
  4. Step 4: Simplify right side
    685,263.60x = 358,722,969,196.38
  5. Step 5: Solve for x
    x = 358,722,969,196.38/685,263.60
  6. Step 6: Final answer
    x = 523,481.72

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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.