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Finding the Fourth Proportional to 289,939.43, 435,034.29 and 156,913.55

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Solution

The fourth proportional to 289,939.43, 435,034.29 and 156,913.55 is: 235,438.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,939.43 : 435,034.29 = 156,913.55 : x
  2. Step 2: Convert to fraction form
    289,939.43/435,034.29 = 156,913.55/x
  3. Step 3: Cross multiply
    289,939.43x = 435,034.29 × 156,913.55
  4. Step 4: Simplify right side
    289,939.43x = 68,262,774,815.63
  5. Step 5: Solve for x
    x = 68,262,774,815.63/289,939.43
  6. Step 6: Final answer
    x = 235,438.05

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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.