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Finding the Fourth Proportional to 355,720.16, 533,581.14 and 145,358.12

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Solution

The fourth proportional to 355,720.16, 533,581.14 and 145,358.12 is: 218,037.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,720.16 : 533,581.14 = 145,358.12 : x
  2. Step 2: Convert to fraction form
    355,720.16/533,581.14 = 145,358.12/x
  3. Step 3: Cross multiply
    355,720.16x = 533,581.14 × 145,358.12
  4. Step 4: Simplify right side
    355,720.16x = 77,560,351,377.86
  5. Step 5: Solve for x
    x = 77,560,351,377.86/355,720.16
  6. Step 6: Final answer
    x = 218,037.55

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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.