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Finding the Fourth Proportional to 521,317.50, 720,008.64 and 351,256.38

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Solution

The fourth proportional to 521,317.50, 720,008.64 and 351,256.38 is: 485,131.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,317.50 : 720,008.64 = 351,256.38 : x
  2. Step 2: Convert to fraction form
    521,317.50/720,008.64 = 351,256.38/x
  3. Step 3: Cross multiply
    521,317.50x = 720,008.64 × 351,256.38
  4. Step 4: Simplify right side
    521,317.50x = 252,907,628,455.12
  5. Step 5: Solve for x
    x = 252,907,628,455.12/521,317.50
  6. Step 6: Final answer
    x = 485,131.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.