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Finding the Fourth Proportional to 721,937.52, 996,281.66 and 399,653.00

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Solution

The fourth proportional to 721,937.52, 996,281.66 and 399,653.00 is: 551,525.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,937.52 : 996,281.66 = 399,653.00 : x
  2. Step 2: Convert to fraction form
    721,937.52/996,281.66 = 399,653.00/x
  3. Step 3: Cross multiply
    721,937.52x = 996,281.66 × 399,653.00
  4. Step 4: Simplify right side
    721,937.52x = 398,166,947,284.31
  5. Step 5: Solve for x
    x = 398,166,947,284.31/721,937.52
  6. Step 6: Final answer
    x = 551,525.49

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Similar ratio
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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.