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Finding the Fourth Proportional to 585,910.40, 879,211.20 and 386,806.40

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Solution

The fourth proportional to 585,910.40, 879,211.20 and 386,806.40 is: 580,437.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    585,910.40 : 879,211.20 = 386,806.40 : x
  2. Step 2: Convert to fraction form
    585,910.40/879,211.20 = 386,806.40/x
  3. Step 3: Cross multiply
    585,910.40x = 879,211.20 × 386,806.40
  4. Step 4: Simplify right side
    585,910.40x = 340,084,519,111.68
  5. Step 5: Solve for x
    x = 340,084,519,111.68/585,910.40
  6. Step 6: Final answer
    x = 580,437.76

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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.