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Finding the Fourth Proportional to 686,019.68, 947,036.24 and 482,245.28

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Solution

The fourth proportional to 686,019.68, 947,036.24 and 482,245.28 is: 665,729.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,019.68 : 947,036.24 = 482,245.28 : x
  2. Step 2: Convert to fraction form
    686,019.68/947,036.24 = 482,245.28/x
  3. Step 3: Cross multiply
    686,019.68x = 947,036.24 × 482,245.28
  4. Step 4: Simplify right side
    686,019.68x = 456,703,756,728.95
  5. Step 5: Solve for x
    x = 456,703,756,728.95/686,019.68
  6. Step 6: Final answer
    x = 665,729.82

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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.