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Finding the Fourth Proportional to 391,015.19, 586,937.54 and 346,326.65

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Solution

The fourth proportional to 391,015.19, 586,937.54 and 346,326.65 is: 519,857.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,015.19 : 586,937.54 = 346,326.65 : x
  2. Step 2: Convert to fraction form
    391,015.19/586,937.54 = 346,326.65/x
  3. Step 3: Cross multiply
    391,015.19x = 586,937.54 × 346,326.65
  4. Step 4: Simplify right side
    391,015.19x = 203,272,111,987.44
  5. Step 5: Solve for x
    x = 203,272,111,987.44/391,015.19
  6. Step 6: Final answer
    x = 519,857.33

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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.