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Finding the Fourth Proportional to 665,179.61, 917,948.73 and 378,699.68

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Solution

The fourth proportional to 665,179.61, 917,948.73 and 378,699.68 is: 522,606.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,179.61 : 917,948.73 = 378,699.68 : x
  2. Step 2: Convert to fraction form
    665,179.61/917,948.73 = 378,699.68/x
  3. Step 3: Cross multiply
    665,179.61x = 917,948.73 × 378,699.68
  4. Step 4: Simplify right side
    665,179.61x = 347,626,885,717.66
  5. Step 5: Solve for x
    x = 347,626,885,717.66/665,179.61
  6. Step 6: Final answer
    x = 522,606.05

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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.