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Finding the Fourth Proportional to 639,736.34, 959,605.74 and 166,420.94

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Solution

The fourth proportional to 639,736.34, 959,605.74 and 166,420.94 is: 249,631.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,736.34 : 959,605.74 = 166,420.94 : x
  2. Step 2: Convert to fraction form
    639,736.34/959,605.74 = 166,420.94/x
  3. Step 3: Cross multiply
    639,736.34x = 959,605.74 × 166,420.94
  4. Step 4: Simplify right side
    639,736.34x = 159,698,484,482.17
  5. Step 5: Solve for x
    x = 159,698,484,482.17/639,736.34
  6. Step 6: Final answer
    x = 249,631.72

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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.