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Finding the Fourth Proportional to 633,985.58, 874,989.81 and 392,345.97

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Solution

The fourth proportional to 633,985.58, 874,989.81 and 392,345.97 is: 541,492.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,985.58 : 874,989.81 = 392,345.97 : x
  2. Step 2: Convert to fraction form
    633,985.58/874,989.81 = 392,345.97/x
  3. Step 3: Cross multiply
    633,985.58x = 874,989.81 × 392,345.97
  4. Step 4: Simplify right side
    633,985.58x = 343,298,725,744.57
  5. Step 5: Solve for x
    x = 343,298,725,744.57/633,985.58
  6. Step 6: Final answer
    x = 541,492.96

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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.