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Finding the Fourth Proportional to 268,720.20, 403,080.30 and 189,988.20

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Solution

The fourth proportional to 268,720.20, 403,080.30 and 189,988.20 is: 284,982.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,720.20 : 403,080.30 = 189,988.20 : x
  2. Step 2: Convert to fraction form
    268,720.20/403,080.30 = 189,988.20/x
  3. Step 3: Cross multiply
    268,720.20x = 403,080.30 × 189,988.20
  4. Step 4: Simplify right side
    268,720.20x = 76,580,500,652.46
  5. Step 5: Solve for x
    x = 76,580,500,652.46/268,720.20
  6. Step 6: Final answer
    x = 284,982.30

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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.