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Finding the Fourth Proportional to 639,567.50, 959,263.76 and 190,357.70

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Solution

The fourth proportional to 639,567.50, 959,263.76 and 190,357.70 is: 285,510.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,567.50 : 959,263.76 = 190,357.70 : x
  2. Step 2: Convert to fraction form
    639,567.50/959,263.76 = 190,357.70/x
  3. Step 3: Cross multiply
    639,567.50x = 959,263.76 × 190,357.70
  4. Step 4: Simplify right side
    639,567.50x = 182,603,237,298.85
  5. Step 5: Solve for x
    x = 182,603,237,298.85/639,567.50
  6. Step 6: Final answer
    x = 285,510.50

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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.