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Finding the Fourth Proportional to 639,718.72, 882,805.98 and 353,232.52

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Solution

The fourth proportional to 639,718.72, 882,805.98 and 353,232.52 is: 487,457.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,718.72 : 882,805.98 = 353,232.52 : x
  2. Step 2: Convert to fraction form
    639,718.72/882,805.98 = 353,232.52/x
  3. Step 3: Cross multiply
    639,718.72x = 882,805.98 × 353,232.52
  4. Step 4: Simplify right side
    639,718.72x = 311,835,780,986.47
  5. Step 5: Solve for x
    x = 311,835,780,986.47/639,718.72
  6. Step 6: Final answer
    x = 487,457.65

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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.