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Finding the Fourth Proportional to 279,717.97, 386,038.67 and 170,816.30

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Solution

The fourth proportional to 279,717.97, 386,038.67 and 170,816.30 is: 235,743.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,717.97 : 386,038.67 = 170,816.30 : x
  2. Step 2: Convert to fraction form
    279,717.97/386,038.67 = 170,816.30/x
  3. Step 3: Cross multiply
    279,717.97x = 386,038.67 × 170,816.30
  4. Step 4: Simplify right side
    279,717.97x = 65,941,697,266.32
  5. Step 5: Solve for x
    x = 65,941,697,266.32/279,717.97
  6. Step 6: Final answer
    x = 235,743.51

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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.