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Finding the Fourth Proportional to 420,556.97, 630,189.38 and 285,445.33

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Solution

The fourth proportional to 420,556.97, 630,189.38 and 285,445.33 is: 427,729.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,556.97 : 630,189.38 = 285,445.33 : x
  2. Step 2: Convert to fraction form
    420,556.97/630,189.38 = 285,445.33/x
  3. Step 3: Cross multiply
    420,556.97x = 630,189.38 × 285,445.33
  4. Step 4: Simplify right side
    420,556.97x = 179,884,614,674.74
  5. Step 5: Solve for x
    x = 179,884,614,674.74/420,556.97
  6. Step 6: Final answer
    x = 427,729.48

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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.