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Finding the Fourth Proportional to 330,230.40, 495,345.60 and 259,371.60

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Solution

The fourth proportional to 330,230.40, 495,345.60 and 259,371.60 is: 389,057.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,230.40 : 495,345.60 = 259,371.60 : x
  2. Step 2: Convert to fraction form
    330,230.40/495,345.60 = 259,371.60/x
  3. Step 3: Cross multiply
    330,230.40x = 495,345.60 × 259,371.60
  4. Step 4: Simplify right side
    330,230.40x = 128,478,580,824.96
  5. Step 5: Solve for x
    x = 128,478,580,824.96/330,230.40
  6. Step 6: Final answer
    x = 389,057.40

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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.