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Finding the Fourth Proportional to 438,245.80, 655,986.30 and 313,829.80

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Solution

The fourth proportional to 438,245.80, 655,986.30 and 313,829.80 is: 469,754.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,245.80 : 655,986.30 = 313,829.80 : x
  2. Step 2: Convert to fraction form
    438,245.80/655,986.30 = 313,829.80/x
  3. Step 3: Cross multiply
    438,245.80x = 655,986.30 × 313,829.80
  4. Step 4: Simplify right side
    438,245.80x = 205,868,049,331.74
  5. Step 5: Solve for x
    x = 205,868,049,331.74/438,245.80
  6. Step 6: Final answer
    x = 469,754.76

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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.