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Finding the Fourth Proportional to 386,239.36, 579,359.52 and 105,759.04

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Solution

The fourth proportional to 386,239.36, 579,359.52 and 105,759.04 is: 158,638.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,239.36 : 579,359.52 = 105,759.04 : x
  2. Step 2: Convert to fraction form
    386,239.36/579,359.52 = 105,759.04/x
  3. Step 3: Cross multiply
    386,239.36x = 579,359.52 × 105,759.04
  4. Step 4: Simplify right side
    386,239.36x = 61,272,506,650.06
  5. Step 5: Solve for x
    x = 61,272,506,650.06/386,239.36
  6. Step 6: Final answer
    x = 158,638.69

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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.