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Finding the Fourth Proportional to 391,022.33, 539,332.54 and 358,860.82

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Solution

The fourth proportional to 391,022.33, 539,332.54 and 358,860.82 is: 494,972.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,022.33 : 539,332.54 = 358,860.82 : x
  2. Step 2: Convert to fraction form
    391,022.33/539,332.54 = 358,860.82/x
  3. Step 3: Cross multiply
    391,022.33x = 539,332.54 × 358,860.82
  4. Step 4: Simplify right side
    391,022.33x = 193,545,315,311.60
  5. Step 5: Solve for x
    x = 193,545,315,311.60/391,022.33
  6. Step 6: Final answer
    x = 494,972.54

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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.