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Finding the Fourth Proportional to 638,309.12, 956,649.60 and 338,933.12

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Solution

The fourth proportional to 638,309.12, 956,649.60 and 338,933.12 is: 507,967.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,309.12 : 956,649.60 = 338,933.12 : x
  2. Step 2: Convert to fraction form
    638,309.12/956,649.60 = 338,933.12/x
  3. Step 3: Cross multiply
    638,309.12x = 956,649.60 × 338,933.12
  4. Step 4: Simplify right side
    638,309.12x = 324,240,233,674.75
  5. Step 5: Solve for x
    x = 324,240,233,674.75/638,309.12
  6. Step 6: Final answer
    x = 507,967.42

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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.