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Finding the Fourth Proportional to 673,287.90, 928,296.91 and 431,172.42

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Solution

The fourth proportional to 673,287.90, 928,296.91 and 431,172.42 is: 594,479.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,287.90 : 928,296.91 = 431,172.42 : x
  2. Step 2: Convert to fraction form
    673,287.90/928,296.91 = 431,172.42/x
  3. Step 3: Cross multiply
    673,287.90x = 928,296.91 × 431,172.42
  4. Step 4: Simplify right side
    673,287.90x = 400,256,019,795.73
  5. Step 5: Solve for x
    x = 400,256,019,795.73/673,287.90
  6. Step 6: Final answer
    x = 594,479.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.