Home / 685,431.10-945,924.47-379,507.47

Finding the Fourth Proportional to 685,431.10, 945,924.47 and 379,507.47

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Solution

The fourth proportional to 685,431.10, 945,924.47 and 379,507.47 is: 523,736.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,431.10 : 945,924.47 = 379,507.47 : x
  2. Step 2: Convert to fraction form
    685,431.10/945,924.47 = 379,507.47/x
  3. Step 3: Cross multiply
    685,431.10x = 945,924.47 × 379,507.47
  4. Step 4: Simplify right side
    685,431.10x = 358,985,395,793.63
  5. Step 5: Solve for x
    x = 358,985,395,793.63/685,431.10
  6. Step 6: Final answer
    x = 523,736.66

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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.