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Finding the Fourth Proportional to 346,949, 478,789.62 and 187,973

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Solution

The fourth proportional to 346,949, 478,789.62 and 187,973 is: 259,402.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,949 : 478,789.62 = 187,973 : x
  2. Step 2: Convert to fraction form
    346,949/478,789.62 = 187,973/x
  3. Step 3: Cross multiply
    346,949x = 478,789.62 × 187,973
  4. Step 4: Simplify right side
    346,949x = 89,999,521,240.26
  5. Step 5: Solve for x
    x = 89,999,521,240.26/346,949
  6. Step 6: Final answer
    x = 259,402.74

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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.