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Finding the Fourth Proportional to 648,693.54, 895,103.19 and 393,995.52

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Solution

The fourth proportional to 648,693.54, 895,103.19 and 393,995.52 is: 543,656.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,693.54 : 895,103.19 = 393,995.52 : x
  2. Step 2: Convert to fraction form
    648,693.54/895,103.19 = 393,995.52/x
  3. Step 3: Cross multiply
    648,693.54x = 895,103.19 × 393,995.52
  4. Step 4: Simplify right side
    648,693.54x = 352,666,646,797.71
  5. Step 5: Solve for x
    x = 352,666,646,797.71/648,693.54
  6. Step 6: Final answer
    x = 543,656.79

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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.