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Finding the Fourth Proportional to 520,716.90, 718,555.48 and 291,234.45

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Solution

The fourth proportional to 520,716.90, 718,555.48 and 291,234.45 is: 401,884.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,716.90 : 718,555.48 = 291,234.45 : x
  2. Step 2: Convert to fraction form
    520,716.90/718,555.48 = 291,234.45/x
  3. Step 3: Cross multiply
    520,716.90x = 718,555.48 × 291,234.45
  4. Step 4: Simplify right side
    520,716.90x = 209,268,110,012.29
  5. Step 5: Solve for x
    x = 209,268,110,012.29/520,716.90
  6. Step 6: Final answer
    x = 401,884.61

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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.