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Finding the Fourth Proportional to 611,957.43, 917,908.10 and 212,629.46

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Solution

The fourth proportional to 611,957.43, 917,908.10 and 212,629.46 is: 318,934.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,957.43 : 917,908.10 = 212,629.46 : x
  2. Step 2: Convert to fraction form
    611,957.43/917,908.10 = 212,629.46/x
  3. Step 3: Cross multiply
    611,957.43x = 917,908.10 × 212,629.46
  4. Step 4: Simplify right side
    611,957.43x = 195,174,298,777.30
  5. Step 5: Solve for x
    x = 195,174,298,777.30/611,957.43
  6. Step 6: Final answer
    x = 318,934.44

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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.