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Finding the Fourth Proportional to 455,517.80, 683,276.70 and 448,519.40

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Solution

The fourth proportional to 455,517.80, 683,276.70 and 448,519.40 is: 672,779.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,517.80 : 683,276.70 = 448,519.40 : x
  2. Step 2: Convert to fraction form
    455,517.80/683,276.70 = 448,519.40/x
  3. Step 3: Cross multiply
    455,517.80x = 683,276.70 × 448,519.40
  4. Step 4: Simplify right side
    455,517.80x = 306,462,855,517.98
  5. Step 5: Solve for x
    x = 306,462,855,517.98/455,517.80
  6. Step 6: Final answer
    x = 672,779.10

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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.