Home / 685,425.21-945,916.35-379,501.59

Finding the Fourth Proportional to 685,425.21, 945,916.35 and 379,501.59

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Solution

The fourth proportional to 685,425.21, 945,916.35 and 379,501.59 is: 523,728.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,425.21 : 945,916.35 = 379,501.59 : x
  2. Step 2: Convert to fraction form
    685,425.21/945,916.35 = 379,501.59/x
  3. Step 3: Cross multiply
    685,425.21x = 945,916.35 × 379,501.59
  4. Step 4: Simplify right side
    685,425.21x = 358,976,758,832.00
  5. Step 5: Solve for x
    x = 358,976,758,832.00/685,425.21
  6. Step 6: Final answer
    x = 523,728.56

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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.