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Finding the Fourth Proportional to 543,057.62, 815,182.35 and 431,455.22

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Solution

The fourth proportional to 543,057.62, 815,182.35 and 431,455.22 is: 647,656.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,057.62 : 815,182.35 = 431,455.22 : x
  2. Step 2: Convert to fraction form
    543,057.62/815,182.35 = 431,455.22/x
  3. Step 3: Cross multiply
    543,057.62x = 815,182.35 × 431,455.22
  4. Step 4: Simplify right side
    543,057.62x = 351,714,680,159.37
  5. Step 5: Solve for x
    x = 351,714,680,159.37/543,057.62
  6. Step 6: Final answer
    x = 647,656.28

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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.