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Finding the Fourth Proportional to 257,691.58, 355,613.70 and 144,516.76

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Solution

The fourth proportional to 257,691.58, 355,613.70 and 144,516.76 is: 199,432.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,691.58 : 355,613.70 = 144,516.76 : x
  2. Step 2: Convert to fraction form
    257,691.58/355,613.70 = 144,516.76/x
  3. Step 3: Cross multiply
    257,691.58x = 355,613.70 × 144,516.76
  4. Step 4: Simplify right side
    257,691.58x = 51,392,139,735.61
  5. Step 5: Solve for x
    x = 51,392,139,735.61/257,691.58
  6. Step 6: Final answer
    x = 199,432.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.