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Finding the Fourth Proportional to 520,003.06, 717,608.97 and 305,146.71

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Solution

The fourth proportional to 520,003.06, 717,608.97 and 305,146.71 is: 421,105.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,003.06 : 717,608.97 = 305,146.71 : x
  2. Step 2: Convert to fraction form
    520,003.06/717,608.97 = 305,146.71/x
  3. Step 3: Cross multiply
    520,003.06x = 717,608.97 × 305,146.71
  4. Step 4: Simplify right side
    520,003.06x = 218,976,016,261.99
  5. Step 5: Solve for x
    x = 218,976,016,261.99/520,003.06
  6. Step 6: Final answer
    x = 421,105.25

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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.