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Finding the Fourth Proportional to 639,693.50, 882,854.79 and 371,421.50

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Solution

The fourth proportional to 639,693.50, 882,854.79 and 371,421.50 is: 512,606.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,693.50 : 882,854.79 = 371,421.50 : x
  2. Step 2: Convert to fraction form
    639,693.50/882,854.79 = 371,421.50/x
  3. Step 3: Cross multiply
    639,693.50x = 882,854.79 × 371,421.50
  4. Step 4: Simplify right side
    639,693.50x = 327,911,250,383.99
  5. Step 5: Solve for x
    x = 327,911,250,383.99/639,693.50
  6. Step 6: Final answer
    x = 512,606.82

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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.