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Finding the Fourth Proportional to 639,494.10, 882,478.53 and 353,013.30

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Solution

The fourth proportional to 639,494.10, 882,478.53 and 353,013.30 is: 487,145.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,494.10 : 882,478.53 = 353,013.30 : x
  2. Step 2: Convert to fraction form
    639,494.10/882,478.53 = 353,013.30/x
  3. Step 3: Cross multiply
    639,494.10x = 882,478.53 × 353,013.30
  4. Step 4: Simplify right side
    639,494.10x = 311,526,658,054.45
  5. Step 5: Solve for x
    x = 311,526,658,054.45/639,494.10
  6. Step 6: Final answer
    x = 487,145.48

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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.