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Finding the Fourth Proportional to 386,534.62, 533,416.75 and 216,772.39

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Solution

The fourth proportional to 386,534.62, 533,416.75 and 216,772.39 is: 299,145.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,534.62 : 533,416.75 = 216,772.39 : x
  2. Step 2: Convert to fraction form
    386,534.62/533,416.75 = 216,772.39/x
  3. Step 3: Cross multiply
    386,534.62x = 533,416.75 × 216,772.39
  4. Step 4: Simplify right side
    386,534.62x = 115,630,023,763.53
  5. Step 5: Solve for x
    x = 115,630,023,763.53/386,534.62
  6. Step 6: Final answer
    x = 299,145.32

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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.