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Finding the Fourth Proportional to 520,396.74, 718,138.17 and 294,037.38

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Solution

The fourth proportional to 520,396.74, 718,138.17 and 294,037.38 is: 405,766.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,396.74 : 718,138.17 = 294,037.38 : x
  2. Step 2: Convert to fraction form
    520,396.74/718,138.17 = 294,037.38/x
  3. Step 3: Cross multiply
    520,396.74x = 718,138.17 × 294,037.38
  4. Step 4: Simplify right side
    520,396.74x = 211,159,465,984.80
  5. Step 5: Solve for x
    x = 211,159,465,984.80/520,396.74
  6. Step 6: Final answer
    x = 405,766.31

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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.