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Finding the Fourth Proportional to 520,242.12, 718,010.34 and 305,499.72

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Solution

The fourth proportional to 520,242.12, 718,010.34 and 305,499.72 is: 421,634.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,242.12 : 718,010.34 = 305,499.72 : x
  2. Step 2: Convert to fraction form
    520,242.12/718,010.34 = 305,499.72/x
  3. Step 3: Cross multiply
    520,242.12x = 718,010.34 × 305,499.72
  4. Step 4: Simplify right side
    520,242.12x = 219,351,957,827.11
  5. Step 5: Solve for x
    x = 219,351,957,827.11/520,242.12
  6. Step 6: Final answer
    x = 421,634.37

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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.