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Finding the Fourth Proportional to 455,516.70, 683,890.65 and 266,171.10

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Solution

The fourth proportional to 455,516.70, 683,890.65 and 266,171.10 is: 399,616.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,516.70 : 683,890.65 = 266,171.10 : x
  2. Step 2: Convert to fraction form
    455,516.70/683,890.65 = 266,171.10/x
  3. Step 3: Cross multiply
    455,516.70x = 683,890.65 × 266,171.10
  4. Step 4: Simplify right side
    455,516.70x = 182,031,926,590.22
  5. Step 5: Solve for x
    x = 182,031,926,590.22/455,516.70
  6. Step 6: Final answer
    x = 399,616.36

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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.