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Finding the Fourth Proportional to 554,661.66, 765,367.20 and 312,930.12

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Solution

The fourth proportional to 554,661.66, 765,367.20 and 312,930.12 is: 431,806.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,661.66 : 765,367.20 = 312,930.12 : x
  2. Step 2: Convert to fraction form
    554,661.66/765,367.20 = 312,930.12/x
  3. Step 3: Cross multiply
    554,661.66x = 765,367.20 × 312,930.12
  4. Step 4: Simplify right side
    554,661.66x = 239,506,449,740.06
  5. Step 5: Solve for x
    x = 239,506,449,740.06/554,661.66
  6. Step 6: Final answer
    x = 431,806.39

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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.