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Finding the Fourth Proportional to 714,239.03, 985,661.96 and 391,979.12

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Solution

The fourth proportional to 714,239.03, 985,661.96 and 391,979.12 is: 540,937.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,239.03 : 985,661.96 = 391,979.12 : x
  2. Step 2: Convert to fraction form
    714,239.03/985,661.96 = 391,979.12/x
  3. Step 3: Cross multiply
    714,239.03x = 985,661.96 × 391,979.12
  4. Step 4: Simplify right side
    714,239.03x = 386,358,900,810.07
  5. Step 5: Solve for x
    x = 386,358,900,810.07/714,239.03
  6. Step 6: Final answer
    x = 540,937.81

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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.