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Finding the Fourth Proportional to 386,866.13, 533,898.95 and 217,100.25

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Solution

The fourth proportional to 386,866.13, 533,898.95 and 217,100.25 is: 299,611.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,866.13 : 533,898.95 = 217,100.25 : x
  2. Step 2: Convert to fraction form
    386,866.13/533,898.95 = 217,100.25/x
  3. Step 3: Cross multiply
    386,866.13x = 533,898.95 × 217,100.25
  4. Step 4: Simplify right side
    386,866.13x = 115,909,594,434.24
  5. Step 5: Solve for x
    x = 115,909,594,434.24/386,866.13
  6. Step 6: Final answer
    x = 299,611.64

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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.