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Finding the Fourth Proportional to 639,720.72, 882,808.74 and 353,234.52

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Solution

The fourth proportional to 639,720.72, 882,808.74 and 353,234.52 is: 487,460.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,720.72 : 882,808.74 = 353,234.52 : x
  2. Step 2: Convert to fraction form
    639,720.72/882,808.74 = 353,234.52/x
  3. Step 3: Cross multiply
    639,720.72x = 882,808.74 × 353,234.52
  4. Step 4: Simplify right side
    639,720.72x = 311,838,521,525.71
  5. Step 5: Solve for x
    x = 311,838,521,525.71/639,720.72
  6. Step 6: Final answer
    x = 487,460.41

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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.