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Finding the Fourth Proportional to 219,862.40, 329,728.80 and 86,698.40

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Solution

The fourth proportional to 219,862.40, 329,728.80 and 86,698.40 is: 130,022.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,862.40 : 329,728.80 = 86,698.40 : x
  2. Step 2: Convert to fraction form
    219,862.40/329,728.80 = 86,698.40/x
  3. Step 3: Cross multiply
    219,862.40x = 329,728.80 × 86,698.40
  4. Step 4: Simplify right side
    219,862.40x = 28,586,959,393.92
  5. Step 5: Solve for x
    x = 28,586,959,393.92/219,862.40
  6. Step 6: Final answer
    x = 130,022.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.