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Finding the Fourth Proportional to 611,424.09, 916,839.88 and 256,342.77

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Solution

The fourth proportional to 611,424.09, 916,839.88 and 256,342.77 is: 384,389.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,424.09 : 916,839.88 = 256,342.77 : x
  2. Step 2: Convert to fraction form
    611,424.09/916,839.88 = 256,342.77/x
  3. Step 3: Cross multiply
    611,424.09x = 916,839.88 × 256,342.77
  4. Step 4: Simplify right side
    611,424.09x = 235,025,273,844.81
  5. Step 5: Solve for x
    x = 235,025,273,844.81/611,424.09
  6. Step 6: Final answer
    x = 384,389.95

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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.