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Finding the Fourth Proportional to 375,471.09, 518,139.43 and 220,419.89

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Solution

The fourth proportional to 375,471.09, 518,139.43 and 220,419.89 is: 304,173.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    375,471.09 : 518,139.43 = 220,419.89 : x
  2. Step 2: Convert to fraction form
    375,471.09/518,139.43 = 220,419.89/x
  3. Step 3: Cross multiply
    375,471.09x = 518,139.43 × 220,419.89
  4. Step 4: Simplify right side
    375,471.09x = 114,208,237,881.07
  5. Step 5: Solve for x
    x = 114,208,237,881.07/375,471.09
  6. Step 6: Final answer
    x = 304,173.18

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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.