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Finding the Fourth Proportional to 404,342.10, 606,513.15 and 278,370.90

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Solution

The fourth proportional to 404,342.10, 606,513.15 and 278,370.90 is: 417,556.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,342.10 : 606,513.15 = 278,370.90 : x
  2. Step 2: Convert to fraction form
    404,342.10/606,513.15 = 278,370.90/x
  3. Step 3: Cross multiply
    404,342.10x = 606,513.15 × 278,370.90
  4. Step 4: Simplify right side
    404,342.10x = 168,835,611,427.34
  5. Step 5: Solve for x
    x = 168,835,611,427.34/404,342.10
  6. Step 6: Final answer
    x = 417,556.35

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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.