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Finding the Fourth Proportional to 438,010.20, 655,703.10 and 260,425.80

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Solution

The fourth proportional to 438,010.20, 655,703.10 and 260,425.80 is: 389,858.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,010.20 : 655,703.10 = 260,425.80 : x
  2. Step 2: Convert to fraction form
    438,010.20/655,703.10 = 260,425.80/x
  3. Step 3: Cross multiply
    438,010.20x = 655,703.10 × 260,425.80
  4. Step 4: Simplify right side
    438,010.20x = 170,762,004,379.98
  5. Step 5: Solve for x
    x = 170,762,004,379.98/438,010.20
  6. Step 6: Final answer
    x = 389,858.51

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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.