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Finding the Fourth Proportional to 520,439.15, 718,404.22 and 339,195.17

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Solution

The fourth proportional to 520,439.15, 718,404.22 and 339,195.17 is: 468,218.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,439.15 : 718,404.22 = 339,195.17 : x
  2. Step 2: Convert to fraction form
    520,439.15/718,404.22 = 339,195.17/x
  3. Step 3: Cross multiply
    520,439.15x = 718,404.22 × 339,195.17
  4. Step 4: Simplify right side
    520,439.15x = 243,679,243,751.62
  5. Step 5: Solve for x
    x = 243,679,243,751.62/520,439.15
  6. Step 6: Final answer
    x = 468,218.51

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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.