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Finding the Fourth Proportional to 619,312.64, 928,970.40 and 170,039.66

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Solution

The fourth proportional to 619,312.64, 928,970.40 and 170,039.66 is: 255,059.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,312.64 : 928,970.40 = 170,039.66 : x
  2. Step 2: Convert to fraction form
    619,312.64/928,970.40 = 170,039.66/x
  3. Step 3: Cross multiply
    619,312.64x = 928,970.40 × 170,039.66
  4. Step 4: Simplify right side
    619,312.64x = 157,961,806,321.21
  5. Step 5: Solve for x
    x = 157,961,806,321.21/619,312.64
  6. Step 6: Final answer
    x = 255,059.88

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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.