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Finding the Fourth Proportional to 520,743.06, 718,591.52 and 291,260.59

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Solution

The fourth proportional to 520,743.06, 718,591.52 and 291,260.59 is: 401,920.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,743.06 : 718,591.52 = 291,260.59 : x
  2. Step 2: Convert to fraction form
    520,743.06/718,591.52 = 291,260.59/x
  3. Step 3: Cross multiply
    520,743.06x = 718,591.52 × 291,260.59
  4. Step 4: Simplify right side
    520,743.06x = 209,297,389,015.87
  5. Step 5: Solve for x
    x = 209,297,389,015.87/520,743.06
  6. Step 6: Final answer
    x = 401,920.65

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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.