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Finding the Fourth Proportional to 718,262.82, 991,210.32 and 395,984.46

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Solution

The fourth proportional to 718,262.82, 991,210.32 and 395,984.46 is: 546,462.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,262.82 : 991,210.32 = 395,984.46 : x
  2. Step 2: Convert to fraction form
    718,262.82/991,210.32 = 395,984.46/x
  3. Step 3: Cross multiply
    718,262.82x = 991,210.32 × 395,984.46
  4. Step 4: Simplify right side
    718,262.82x = 392,503,883,311.63
  5. Step 5: Solve for x
    x = 392,503,883,311.63/718,262.82
  6. Step 6: Final answer
    x = 546,462.76

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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.