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Finding the Fourth Proportional to 409,622.40, 614,433.60 and 390,268.80

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Solution

The fourth proportional to 409,622.40, 614,433.60 and 390,268.80 is: 585,403.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,622.40 : 614,433.60 = 390,268.80 : x
  2. Step 2: Convert to fraction form
    409,622.40/614,433.60 = 390,268.80/x
  3. Step 3: Cross multiply
    409,622.40x = 614,433.60 × 390,268.80
  4. Step 4: Simplify right side
    409,622.40x = 239,794,263,751.68
  5. Step 5: Solve for x
    x = 239,794,263,751.68/409,622.40
  6. Step 6: Final answer
    x = 585,403.20

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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.