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Finding the Fourth Proportional to 425,660.52, 638,678.85 and 223,208.31

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Solution

The fourth proportional to 425,660.52, 638,678.85 and 223,208.31 is: 334,911.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,660.52 : 638,678.85 = 223,208.31 : x
  2. Step 2: Convert to fraction form
    425,660.52/638,678.85 = 223,208.31/x
  3. Step 3: Cross multiply
    425,660.52x = 638,678.85 × 223,208.31
  4. Step 4: Simplify right side
    425,660.52x = 142,558,426,741.24
  5. Step 5: Solve for x
    x = 142,558,426,741.24/425,660.52
  6. Step 6: Final answer
    x = 334,911.09

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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.