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Finding the Fourth Proportional to 442,645.80, 664,659.90 and 256,021.80

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Solution

The fourth proportional to 442,645.80, 664,659.90 and 256,021.80 is: 384,432.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,645.80 : 664,659.90 = 256,021.80 : x
  2. Step 2: Convert to fraction form
    442,645.80/664,659.90 = 256,021.80/x
  3. Step 3: Cross multiply
    442,645.80x = 664,659.90 × 256,021.80
  4. Step 4: Simplify right side
    442,645.80x = 170,167,423,985.82
  5. Step 5: Solve for x
    x = 170,167,423,985.82/442,645.80
  6. Step 6: Final answer
    x = 384,432.48

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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.