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Finding the Fourth Proportional to 559,821.51, 772,553.70 and 305,172.90

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Solution

The fourth proportional to 559,821.51, 772,553.70 and 305,172.90 is: 421,138.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,821.51 : 772,553.70 = 305,172.90 : x
  2. Step 2: Convert to fraction form
    559,821.51/772,553.70 = 305,172.90/x
  3. Step 3: Cross multiply
    559,821.51x = 772,553.70 × 305,172.90
  4. Step 4: Simplify right side
    559,821.51x = 235,762,453,034.73
  5. Step 5: Solve for x
    x = 235,762,453,034.73/559,821.51
  6. Step 6: Final answer
    x = 421,138.61

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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.