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Finding the Fourth Proportional to 381,513.60, 572,270.40 and 115,315.20

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Solution

The fourth proportional to 381,513.60, 572,270.40 and 115,315.20 is: 172,972.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,513.60 : 572,270.40 = 115,315.20 : x
  2. Step 2: Convert to fraction form
    381,513.60/572,270.40 = 115,315.20/x
  3. Step 3: Cross multiply
    381,513.60x = 572,270.40 × 115,315.20
  4. Step 4: Simplify right side
    381,513.60x = 65,991,475,630.08
  5. Step 5: Solve for x
    x = 65,991,475,630.08/381,513.60
  6. Step 6: Final answer
    x = 172,972.80

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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.