Home / 639,841.50-882,981.27-371,586.78

Finding the Fourth Proportional to 639,841.50, 882,981.27 and 371,586.78

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Solution

The fourth proportional to 639,841.50, 882,981.27 and 371,586.78 is: 512,789.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,841.50 : 882,981.27 = 371,586.78 : x
  2. Step 2: Convert to fraction form
    639,841.50/882,981.27 = 371,586.78/x
  3. Step 3: Cross multiply
    639,841.50x = 882,981.27 × 371,586.78
  4. Step 4: Simplify right side
    639,841.50x = 328,104,166,919.61
  5. Step 5: Solve for x
    x = 328,104,166,919.61/639,841.50
  6. Step 6: Final answer
    x = 512,789.76

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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.