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Finding the Fourth Proportional to 330,358.60, 495,537.90 and 120,003.40

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Solution

The fourth proportional to 330,358.60, 495,537.90 and 120,003.40 is: 180,005.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,358.60 : 495,537.90 = 120,003.40 : x
  2. Step 2: Convert to fraction form
    330,358.60/495,537.90 = 120,003.40/x
  3. Step 3: Cross multiply
    330,358.60x = 495,537.90 × 120,003.40
  4. Step 4: Simplify right side
    330,358.60x = 59,466,232,828.86
  5. Step 5: Solve for x
    x = 59,466,232,828.86/330,358.60
  6. Step 6: Final answer
    x = 180,005.10

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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.