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Finding the Fourth Proportional to 358,722.54, 538,111.62 and 145,388.93

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Solution

The fourth proportional to 358,722.54, 538,111.62 and 145,388.93 is: 218,094.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,722.54 : 538,111.62 = 145,388.93 : x
  2. Step 2: Convert to fraction form
    358,722.54/538,111.62 = 145,388.93/x
  3. Step 3: Cross multiply
    358,722.54x = 538,111.62 × 145,388.93
  4. Step 4: Simplify right side
    358,722.54x = 78,235,469,961.81
  5. Step 5: Solve for x
    x = 78,235,469,961.81/358,722.54
  6. Step 6: Final answer
    x = 218,094.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.