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Finding the Fourth Proportional to 393,185.90, 542,779.22 and 296,428.91

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Solution

The fourth proportional to 393,185.90, 542,779.22 and 296,428.91 is: 409,209.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,185.90 : 542,779.22 = 296,428.91 : x
  2. Step 2: Convert to fraction form
    393,185.90/542,779.22 = 296,428.91/x
  3. Step 3: Cross multiply
    393,185.90x = 542,779.22 × 296,428.91
  4. Step 4: Simplify right side
    393,185.90x = 160,895,448,359.21
  5. Step 5: Solve for x
    x = 160,895,448,359.21/393,185.90
  6. Step 6: Final answer
    x = 409,209.61

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1.5x scale

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.