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Finding the Fourth Proportional to 330,010.40, 495,015.60 and 290,644.40

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Solution

The fourth proportional to 330,010.40, 495,015.60 and 290,644.40 is: 435,966.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,010.40 : 495,015.60 = 290,644.40 : x
  2. Step 2: Convert to fraction form
    330,010.40/495,015.60 = 290,644.40/x
  3. Step 3: Cross multiply
    330,010.40x = 495,015.60 × 290,644.40
  4. Step 4: Simplify right side
    330,010.40x = 143,873,512,052.64
  5. Step 5: Solve for x
    x = 143,873,512,052.64/330,010.40
  6. Step 6: Final answer
    x = 435,966.60

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1.5x scale

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.