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Finding the Fourth Proportional to 206,720.20, 310,080.30 and 56,960.20

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Solution

The fourth proportional to 206,720.20, 310,080.30 and 56,960.20 is: 85,440.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,720.20 : 310,080.30 = 56,960.20 : x
  2. Step 2: Convert to fraction form
    206,720.20/310,080.30 = 56,960.20/x
  3. Step 3: Cross multiply
    206,720.20x = 310,080.30 × 56,960.20
  4. Step 4: Simplify right side
    206,720.20x = 17,662,235,904.06
  5. Step 5: Solve for x
    x = 17,662,235,904.06/206,720.20
  6. Step 6: Final answer
    x = 85,440.30

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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.