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Finding the Fourth Proportional to 455,187.90, 681,226.65 and 399,200.70

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Solution

The fourth proportional to 455,187.90, 681,226.65 and 399,200.70 is: 597,437.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,187.90 : 681,226.65 = 399,200.70 : x
  2. Step 2: Convert to fraction form
    455,187.90/681,226.65 = 399,200.70/x
  3. Step 3: Cross multiply
    455,187.90x = 681,226.65 × 399,200.70
  4. Step 4: Simplify right side
    455,187.90x = 271,946,155,538.66
  5. Step 5: Solve for x
    x = 271,946,155,538.66/455,187.90
  6. Step 6: Final answer
    x = 597,437.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.