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Finding the Fourth Proportional to 639,608.61, 882,657.42 and 353,126.59

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Solution

The fourth proportional to 639,608.61, 882,657.42 and 353,126.59 is: 487,313.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,608.61 : 882,657.42 = 353,126.59 : x
  2. Step 2: Convert to fraction form
    639,608.61/882,657.42 = 353,126.59/x
  3. Step 3: Cross multiply
    639,608.61x = 882,657.42 × 353,126.59
  4. Step 4: Simplify right side
    639,608.61x = 311,689,804,862.80
  5. Step 5: Solve for x
    x = 311,689,804,862.80/639,608.61
  6. Step 6: Final answer
    x = 487,313.34

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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.