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Finding the Fourth Proportional to 712,546.92, 983,278.53 and 390,194.85

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Solution

The fourth proportional to 712,546.92, 983,278.53 and 390,194.85 is: 538,449.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,546.92 : 983,278.53 = 390,194.85 : x
  2. Step 2: Convert to fraction form
    712,546.92/983,278.53 = 390,194.85/x
  3. Step 3: Cross multiply
    712,546.92x = 983,278.53 × 390,194.85
  4. Step 4: Simplify right side
    712,546.92x = 383,670,218,521.57
  5. Step 5: Solve for x
    x = 383,670,218,521.57/712,546.92
  6. Step 6: Final answer
    x = 538,449.06

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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.