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Finding the Fourth Proportional to 665,328.66, 918,162.33 and 378,849.90

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Solution

The fourth proportional to 665,328.66, 918,162.33 and 378,849.90 is: 522,817.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,328.66 : 918,162.33 = 378,849.90 : x
  2. Step 2: Convert to fraction form
    665,328.66/918,162.33 = 378,849.90/x
  3. Step 3: Cross multiply
    665,328.66x = 918,162.33 × 378,849.90
  4. Step 4: Simplify right side
    665,328.66x = 347,845,706,904.27
  5. Step 5: Solve for x
    x = 347,845,706,904.27/665,328.66
  6. Step 6: Final answer
    x = 522,817.86

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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.