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Finding the Fourth Proportional to 651,207.51, 898,698.40 and 393,080.36

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Solution

The fourth proportional to 651,207.51, 898,698.40 and 393,080.36 is: 542,470.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,207.51 : 898,698.40 = 393,080.36 : x
  2. Step 2: Convert to fraction form
    651,207.51/898,698.40 = 393,080.36/x
  3. Step 3: Cross multiply
    651,207.51x = 898,698.40 × 393,080.36
  4. Step 4: Simplify right side
    651,207.51x = 353,260,690,603.42
  5. Step 5: Solve for x
    x = 353,260,690,603.42/651,207.51
  6. Step 6: Final answer
    x = 542,470.23

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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.