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Finding the Fourth Proportional to 718,235.64, 991,171.89 and 395,957.30

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Solution

The fourth proportional to 718,235.64, 991,171.89 and 395,957.30 is: 546,424.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,235.64 : 991,171.89 = 395,957.30 : x
  2. Step 2: Convert to fraction form
    718,235.64/991,171.89 = 395,957.30/x
  3. Step 3: Cross multiply
    718,235.64x = 991,171.89 × 395,957.30
  4. Step 4: Simplify right side
    718,235.64x = 392,461,740,444.44
  5. Step 5: Solve for x
    x = 392,461,740,444.44/718,235.64
  6. Step 6: Final answer
    x = 546,424.76

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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.