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Finding the Fourth Proportional to 520,505.20, 718,020.21 and 316,618.48

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Solution

The fourth proportional to 520,505.20, 718,020.21 and 316,618.48 is: 436,765.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,505.20 : 718,020.21 = 316,618.48 : x
  2. Step 2: Convert to fraction form
    520,505.20/718,020.21 = 316,618.48/x
  3. Step 3: Cross multiply
    520,505.20x = 718,020.21 × 316,618.48
  4. Step 4: Simplify right side
    520,505.20x = 227,338,467,499.48
  5. Step 5: Solve for x
    x = 227,338,467,499.48/520,505.20
  6. Step 6: Final answer
    x = 436,765.03

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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.