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Finding the Fourth Proportional to 330,076.40, 495,114.60 and 211,881.20

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Solution

The fourth proportional to 330,076.40, 495,114.60 and 211,881.20 is: 317,821.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,076.40 : 495,114.60 = 211,881.20 : x
  2. Step 2: Convert to fraction form
    330,076.40/495,114.60 = 211,881.20/x
  3. Step 3: Cross multiply
    330,076.40x = 495,114.60 × 211,881.20
  4. Step 4: Simplify right side
    330,076.40x = 104,905,475,585.52
  5. Step 5: Solve for x
    x = 104,905,475,585.52/330,076.40
  6. Step 6: Final answer
    x = 317,821.80

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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.