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Finding the Fourth Proportional to 611,957.28, 916,919.78 and 374,801.43

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Solution

The fourth proportional to 611,957.28, 916,919.78 and 374,801.43 is: 561,579.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,957.28 : 916,919.78 = 374,801.43 : x
  2. Step 2: Convert to fraction form
    611,957.28/916,919.78 = 374,801.43/x
  3. Step 3: Cross multiply
    611,957.28x = 916,919.78 × 374,801.43
  4. Step 4: Simplify right side
    611,957.28x = 343,662,842,865.28
  5. Step 5: Solve for x
    x = 343,662,842,865.28/611,957.28
  6. Step 6: Final answer
    x = 561,579.79

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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.