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Finding the Fourth Proportional to 518,905.70, 778,285.65 and 163,955.60

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Solution

The fourth proportional to 518,905.70, 778,285.65 and 163,955.60 is: 245,910.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,905.70 : 778,285.65 = 163,955.60 : x
  2. Step 2: Convert to fraction form
    518,905.70/778,285.65 = 163,955.60/x
  3. Step 3: Cross multiply
    518,905.70x = 778,285.65 × 163,955.60
  4. Step 4: Simplify right side
    518,905.70x = 127,604,290,717.14
  5. Step 5: Solve for x
    x = 127,604,290,717.14/518,905.70
  6. Step 6: Final answer
    x = 245,910.37

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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.