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Finding the Fourth Proportional to 389,862.32, 538,011.62 and 211,014.32

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Solution

The fourth proportional to 389,862.32, 538,011.62 and 211,014.32 is: 291,200.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,862.32 : 538,011.62 = 211,014.32 : x
  2. Step 2: Convert to fraction form
    389,862.32/538,011.62 = 211,014.32/x
  3. Step 3: Cross multiply
    389,862.32x = 538,011.62 × 211,014.32
  4. Step 4: Simplify right side
    389,862.32x = 113,528,156,146.40
  5. Step 5: Solve for x
    x = 113,528,156,146.40/389,862.32
  6. Step 6: Final answer
    x = 291,200.64

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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.