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Finding the Fourth Proportional to 356,803.07, 491,911.90 and 283,458.85

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Solution

The fourth proportional to 356,803.07, 491,911.90 and 283,458.85 is: 390,794.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,803.07 : 491,911.90 = 283,458.85 : x
  2. Step 2: Convert to fraction form
    356,803.07/491,911.90 = 283,458.85/x
  3. Step 3: Cross multiply
    356,803.07x = 491,911.90 × 283,458.85
  4. Step 4: Simplify right side
    356,803.07x = 139,436,779,443.13
  5. Step 5: Solve for x
    x = 139,436,779,443.13/356,803.07
  6. Step 6: Final answer
    x = 390,794.79

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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.