Home / 279,731.12-386,174.93-218,345.49

Finding the Fourth Proportional to 279,731.12, 386,174.93 and 218,345.49

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Solution

The fourth proportional to 279,731.12, 386,174.93 and 218,345.49 is: 301,430.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,731.12 : 386,174.93 = 218,345.49 : x
  2. Step 2: Convert to fraction form
    279,731.12/386,174.93 = 218,345.49/x
  3. Step 3: Cross multiply
    279,731.12x = 386,174.93 × 218,345.49
  4. Step 4: Simplify right side
    279,731.12x = 84,319,553,224.84
  5. Step 5: Solve for x
    x = 84,319,553,224.84/279,731.12
  6. Step 6: Final answer
    x = 301,430.73

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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.