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Finding the Fourth Proportional to 438,238.80, 655,975.80 and 313,822.80

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Solution

The fourth proportional to 438,238.80, 655,975.80 and 313,822.80 is: 469,744.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,238.80 : 655,975.80 = 313,822.80 : x
  2. Step 2: Convert to fraction form
    438,238.80/655,975.80 = 313,822.80/x
  3. Step 3: Cross multiply
    438,238.80x = 655,975.80 × 313,822.80
  4. Step 4: Simplify right side
    438,238.80x = 205,860,162,288.24
  5. Step 5: Solve for x
    x = 205,860,162,288.24/438,238.80
  6. Step 6: Final answer
    x = 469,744.26

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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.