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Finding the Fourth Proportional to 521,901.66, 720,212.07 and 307,055.54

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Solution

The fourth proportional to 521,901.66, 720,212.07 and 307,055.54 is: 423,729.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,901.66 : 720,212.07 = 307,055.54 : x
  2. Step 2: Convert to fraction form
    521,901.66/720,212.07 = 307,055.54/x
  3. Step 3: Cross multiply
    521,901.66x = 720,212.07 × 307,055.54
  4. Step 4: Simplify right side
    521,901.66x = 221,145,109,020.36
  5. Step 5: Solve for x
    x = 221,145,109,020.36/521,901.66
  6. Step 6: Final answer
    x = 423,729.46

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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.