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Finding the Fourth Proportional to 665,957.40, 918,844.02 and 379,471.38

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Solution

The fourth proportional to 665,957.40, 918,844.02 and 379,471.38 is: 523,569.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,957.40 : 918,844.02 = 379,471.38 : x
  2. Step 2: Convert to fraction form
    665,957.40/918,844.02 = 379,471.38/x
  3. Step 3: Cross multiply
    665,957.40x = 918,844.02 × 379,471.38
  4. Step 4: Simplify right side
    665,957.40x = 348,675,008,274.15
  5. Step 5: Solve for x
    x = 348,675,008,274.15/665,957.40
  6. Step 6: Final answer
    x = 523,569.54

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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.