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Finding the Fourth Proportional to 697,785.20, 962,888.68 and 395,979.20

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Solution

The fourth proportional to 697,785.20, 962,888.68 and 395,979.20 is: 546,420.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,785.20 : 962,888.68 = 395,979.20 : x
  2. Step 2: Convert to fraction form
    697,785.20/962,888.68 = 395,979.20/x
  3. Step 3: Cross multiply
    697,785.20x = 962,888.68 × 395,979.20
  4. Step 4: Simplify right side
    697,785.20x = 381,283,889,195.46
  5. Step 5: Solve for x
    x = 381,283,889,195.46/697,785.20
  6. Step 6: Final answer
    x = 546,420.14

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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.