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Finding the Fourth Proportional to 289,497.78, 434,193.75 and 79,133.76

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Solution

The fourth proportional to 289,497.78, 434,193.75 and 79,133.76 is: 118,686.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,497.78 : 434,193.75 = 79,133.76 : x
  2. Step 2: Convert to fraction form
    289,497.78/434,193.75 = 79,133.76/x
  3. Step 3: Cross multiply
    289,497.78x = 434,193.75 × 79,133.76
  4. Step 4: Simplify right side
    289,497.78x = 34,359,384,006.00
  5. Step 5: Solve for x
    x = 34,359,384,006.00/289,497.78
  6. Step 6: Final answer
    x = 118,686.17

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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.