Home / 385,070.28-531,234.24-257,786.88

Finding the Fourth Proportional to 385,070.28, 531,234.24 and 257,786.88

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Solution

The fourth proportional to 385,070.28, 531,234.24 and 257,786.88 is: 355,636.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,070.28 : 531,234.24 = 257,786.88 : x
  2. Step 2: Convert to fraction form
    385,070.28/531,234.24 = 257,786.88/x
  3. Step 3: Cross multiply
    385,070.28x = 531,234.24 × 257,786.88
  4. Step 4: Simplify right side
    385,070.28x = 136,945,217,278.77
  5. Step 5: Solve for x
    x = 136,945,217,278.77/385,070.28
  6. Step 6: Final answer
    x = 355,636.94

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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.