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Finding the Fourth Proportional to 510,080.10, 765,120.15 and 431,348.10

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Solution

The fourth proportional to 510,080.10, 765,120.15 and 431,348.10 is: 647,022.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    510,080.10 : 765,120.15 = 431,348.10 : x
  2. Step 2: Convert to fraction form
    510,080.10/765,120.15 = 431,348.10/x
  3. Step 3: Cross multiply
    510,080.10x = 765,120.15 × 431,348.10
  4. Step 4: Simplify right side
    510,080.10x = 330,033,122,974.22
  5. Step 5: Solve for x
    x = 330,033,122,974.22/510,080.10
  6. Step 6: Final answer
    x = 647,022.15

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Double scale
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Similar ratio
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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.