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Finding the Fourth Proportional to 330,200.10, 495,300.15 and 172,476.90

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Solution

The fourth proportional to 330,200.10, 495,300.15 and 172,476.90 is: 258,715.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,200.10 : 495,300.15 = 172,476.90 : x
  2. Step 2: Convert to fraction form
    330,200.10/495,300.15 = 172,476.90/x
  3. Step 3: Cross multiply
    330,200.10x = 495,300.15 × 172,476.90
  4. Step 4: Simplify right side
    330,200.10x = 85,427,834,441.54
  5. Step 5: Solve for x
    x = 85,427,834,441.54/330,200.10
  6. Step 6: Final answer
    x = 258,715.35

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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.