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Finding the Fourth Proportional to 714,063.34, 985,374.74 and 391,766.78

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Solution

The fourth proportional to 714,063.34, 985,374.74 and 391,766.78 is: 540,620.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,063.34 : 985,374.74 = 391,766.78 : x
  2. Step 2: Convert to fraction form
    714,063.34/985,374.74 = 391,766.78/x
  3. Step 3: Cross multiply
    714,063.34x = 985,374.74 × 391,766.78
  4. Step 4: Simplify right side
    714,063.34x = 386,037,088,983.14
  5. Step 5: Solve for x
    x = 386,037,088,983.14/714,063.34
  6. Step 6: Final answer
    x = 540,620.23

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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.