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Finding the Fourth Proportional to 718,156.44, 991,055.61 and 395,871.93

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Solution

The fourth proportional to 718,156.44, 991,055.61 and 395,871.93 is: 546,303.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,156.44 : 991,055.61 = 395,871.93 : x
  2. Step 2: Convert to fraction form
    718,156.44/991,055.61 = 395,871.93/x
  3. Step 3: Cross multiply
    718,156.44x = 991,055.61 × 395,871.93
  4. Step 4: Simplify right side
    718,156.44x = 392,331,097,068.03
  5. Step 5: Solve for x
    x = 392,331,097,068.03/718,156.44
  6. Step 6: Final answer
    x = 546,303.11

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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.