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Finding the Fourth Proportional to 289,638.06, 399,699.90 and 176,460.90

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Solution

The fourth proportional to 289,638.06, 399,699.90 and 176,460.90 is: 243,515.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,638.06 : 399,699.90 = 176,460.90 : x
  2. Step 2: Convert to fraction form
    289,638.06/399,699.90 = 176,460.90/x
  3. Step 3: Cross multiply
    289,638.06x = 399,699.90 × 176,460.90
  4. Step 4: Simplify right side
    289,638.06x = 70,531,404,083.91
  5. Step 5: Solve for x
    x = 70,531,404,083.91/289,638.06
  6. Step 6: Final answer
    x = 243,515.66

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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.