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Finding the Fourth Proportional to 611,313.89, 915,777.97 and 400,312.13

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Solution

The fourth proportional to 611,313.89, 915,777.97 and 400,312.13 is: 599,687.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,313.89 : 915,777.97 = 400,312.13 : x
  2. Step 2: Convert to fraction form
    611,313.89/915,777.97 = 400,312.13/x
  3. Step 3: Cross multiply
    611,313.89x = 915,777.97 × 400,312.13
  4. Step 4: Simplify right side
    611,313.89x = 366,597,024,198.11
  5. Step 5: Solve for x
    x = 366,597,024,198.11/611,313.89
  6. Step 6: Final answer
    x = 599,687.06

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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.