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Finding the Fourth Proportional to 393,973.70, 590,111.72 and 266,916.86

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Solution

The fourth proportional to 393,973.70, 590,111.72 and 266,916.86 is: 399,800.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,973.70 : 590,111.72 = 266,916.86 : x
  2. Step 2: Convert to fraction form
    393,973.70/590,111.72 = 266,916.86/x
  3. Step 3: Cross multiply
    393,973.70x = 590,111.72 × 266,916.86
  4. Step 4: Simplify right side
    393,973.70x = 157,510,765,075.13
  5. Step 5: Solve for x
    x = 157,510,765,075.13/393,973.70
  6. Step 6: Final answer
    x = 399,800.20

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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.