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Finding the Fourth Proportional to 714,293.76, 985,722.28 and 392,009.07

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Solution

The fourth proportional to 714,293.76, 985,722.28 and 392,009.07 is: 540,970.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,293.76 : 985,722.28 = 392,009.07 : x
  2. Step 2: Convert to fraction form
    714,293.76/985,722.28 = 392,009.07/x
  3. Step 3: Cross multiply
    714,293.76x = 985,722.28 × 392,009.07
  4. Step 4: Simplify right side
    714,293.76x = 386,412,074,261.08
  5. Step 5: Solve for x
    x = 386,412,074,261.08/714,293.76
  6. Step 6: Final answer
    x = 540,970.81

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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.