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Finding the Fourth Proportional to 386,235.40, 579,353.10 and 105,752.20

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Solution

The fourth proportional to 386,235.40, 579,353.10 and 105,752.20 is: 158,628.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,235.40 : 579,353.10 = 105,752.20 : x
  2. Step 2: Convert to fraction form
    386,235.40/579,353.10 = 105,752.20/x
  3. Step 3: Cross multiply
    386,235.40x = 579,353.10 × 105,752.20
  4. Step 4: Simplify right side
    386,235.40x = 61,267,864,901.82
  5. Step 5: Solve for x
    x = 61,267,864,901.82/386,235.40
  6. Step 6: Final answer
    x = 158,628.30

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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.