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Finding the Fourth Proportional to 719,172.39, 992,481.71 and 392,503.24

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Solution

The fourth proportional to 719,172.39, 992,481.71 and 392,503.24 is: 541,667.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,172.39 : 992,481.71 = 392,503.24 : x
  2. Step 2: Convert to fraction form
    719,172.39/992,481.71 = 392,503.24/x
  3. Step 3: Cross multiply
    719,172.39x = 992,481.71 × 392,503.24
  4. Step 4: Simplify right side
    719,172.39x = 389,552,286,815.74
  5. Step 5: Solve for x
    x = 389,552,286,815.74/719,172.39
  6. Step 6: Final answer
    x = 541,667.47

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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.