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Finding the Fourth Proportional to 405,231.40, 608,883.90 and 359,612.20

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Solution

The fourth proportional to 405,231.40, 608,883.90 and 359,612.20 is: 540,338.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,231.40 : 608,883.90 = 359,612.20 : x
  2. Step 2: Convert to fraction form
    405,231.40/608,883.90 = 359,612.20/x
  3. Step 3: Cross multiply
    405,231.40x = 608,883.90 × 359,612.20
  4. Step 4: Simplify right side
    405,231.40x = 218,962,078,823.58
  5. Step 5: Solve for x
    x = 218,962,078,823.58/405,231.40
  6. Step 6: Final answer
    x = 540,338.38

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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.