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Finding the Fourth Proportional to 591,381.60, 816,106.08 and 319,449.40

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Solution

The fourth proportional to 591,381.60, 816,106.08 and 319,449.40 is: 440,839.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,381.60 : 816,106.08 = 319,449.40 : x
  2. Step 2: Convert to fraction form
    591,381.60/816,106.08 = 319,449.40/x
  3. Step 3: Cross multiply
    591,381.60x = 816,106.08 × 319,449.40
  4. Step 4: Simplify right side
    591,381.60x = 260,704,597,592.35
  5. Step 5: Solve for x
    x = 260,704,597,592.35/591,381.60
  6. Step 6: Final answer
    x = 440,839.89

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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.