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Finding the Fourth Proportional to 381,862.80, 572,794.20 and 328,208.40

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Solution

The fourth proportional to 381,862.80, 572,794.20 and 328,208.40 is: 492,312.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,862.80 : 572,794.20 = 328,208.40 : x
  2. Step 2: Convert to fraction form
    381,862.80/572,794.20 = 328,208.40/x
  3. Step 3: Cross multiply
    381,862.80x = 572,794.20 × 328,208.40
  4. Step 4: Simplify right side
    381,862.80x = 187,995,867,911.28
  5. Step 5: Solve for x
    x = 187,995,867,911.28/381,862.80
  6. Step 6: Final answer
    x = 492,312.60

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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.