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Finding the Fourth Proportional to 572,779.65, 790,348.15 and 331,015.58

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Solution

The fourth proportional to 572,779.65, 790,348.15 and 331,015.58 is: 456,750.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,779.65 : 790,348.15 = 331,015.58 : x
  2. Step 2: Convert to fraction form
    572,779.65/790,348.15 = 331,015.58/x
  3. Step 3: Cross multiply
    572,779.65x = 790,348.15 × 331,015.58
  4. Step 4: Simplify right side
    572,779.65x = 261,617,550,700.01
  5. Step 5: Solve for x
    x = 261,617,550,700.01/572,779.65
  6. Step 6: Final answer
    x = 456,750.77

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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.