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Finding the Fourth Proportional to 316,779.80, 437,156.10 and 189,455.40

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Solution

The fourth proportional to 316,779.80, 437,156.10 and 189,455.40 is: 261,448.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,779.80 : 437,156.10 = 189,455.40 : x
  2. Step 2: Convert to fraction form
    316,779.80/437,156.10 = 189,455.40/x
  3. Step 3: Cross multiply
    316,779.80x = 437,156.10 × 189,455.40
  4. Step 4: Simplify right side
    316,779.80x = 82,821,583,787.94
  5. Step 5: Solve for x
    x = 82,821,583,787.94/316,779.80
  6. Step 6: Final answer
    x = 261,448.44

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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.