Home / 685,423.21-945,913.58-379,499.58

Finding the Fourth Proportional to 685,423.21, 945,913.58 and 379,499.58

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Solution

The fourth proportional to 685,423.21, 945,913.58 and 379,499.58 is: 523,725.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,423.21 : 945,913.58 = 379,499.58 : x
  2. Step 2: Convert to fraction form
    685,423.21/945,913.58 = 379,499.58/x
  3. Step 3: Cross multiply
    685,423.21x = 945,913.58 × 379,499.58
  4. Step 4: Simplify right side
    685,423.21x = 358,973,806,326.30
  5. Step 5: Solve for x
    x = 358,973,806,326.30/685,423.21
  6. Step 6: Final answer
    x = 523,725.79

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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.