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Finding the Fourth Proportional to 404,657.60, 606,986.40 and 278,686.40

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Solution

The fourth proportional to 404,657.60, 606,986.40 and 278,686.40 is: 418,029.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,657.60 : 606,986.40 = 278,686.40 : x
  2. Step 2: Convert to fraction form
    404,657.60/606,986.40 = 278,686.40/x
  3. Step 3: Cross multiply
    404,657.60x = 606,986.40 × 278,686.40
  4. Step 4: Simplify right side
    404,657.60x = 169,158,854,664.96
  5. Step 5: Solve for x
    x = 169,158,854,664.96/404,657.60
  6. Step 6: Final answer
    x = 418,029.60

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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.