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Finding the Fourth Proportional to 403,876.54, 557,022.45 and 355,373.74

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Solution

The fourth proportional to 403,876.54, 557,022.45 and 355,373.74 is: 490,127.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,876.54 : 557,022.45 = 355,373.74 : x
  2. Step 2: Convert to fraction form
    403,876.54/557,022.45 = 355,373.74/x
  3. Step 3: Cross multiply
    403,876.54x = 557,022.45 × 355,373.74
  4. Step 4: Simplify right side
    403,876.54x = 197,951,151,320.46
  5. Step 5: Solve for x
    x = 197,951,151,320.46/403,876.54
  6. Step 6: Final answer
    x = 490,127.88

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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.