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Finding the Fourth Proportional to 543,640.17, 815,748.21 and 395,106.42

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Solution

The fourth proportional to 543,640.17, 815,748.21 and 395,106.42 is: 592,868.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,640.17 : 815,748.21 = 395,106.42 : x
  2. Step 2: Convert to fraction form
    543,640.17/815,748.21 = 395,106.42/x
  3. Step 3: Cross multiply
    543,640.17x = 815,748.21 × 395,106.42
  4. Step 4: Simplify right side
    543,640.17x = 322,307,354,874.51
  5. Step 5: Solve for x
    x = 322,307,354,874.51/543,640.17
  6. Step 6: Final answer
    x = 592,868.91

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1.5x scale

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.