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Finding the Fourth Proportional to 330,390.72, 495,410.40 and 130,703.04

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Solution

The fourth proportional to 330,390.72, 495,410.40 and 130,703.04 is: 195,985.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,390.72 : 495,410.40 = 130,703.04 : x
  2. Step 2: Convert to fraction form
    330,390.72/495,410.40 = 130,703.04/x
  3. Step 3: Cross multiply
    330,390.72x = 495,410.40 × 130,703.04
  4. Step 4: Simplify right side
    330,390.72x = 64,751,645,327.62
  5. Step 5: Solve for x
    x = 64,751,645,327.62/330,390.72
  6. Step 6: Final answer
    x = 195,985.06

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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.