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Finding the Fourth Proportional to 639,486.74, 882,497.82 and 353,000.66

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Solution

The fourth proportional to 639,486.74, 882,497.82 and 353,000.66 is: 487,144.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,486.74 : 882,497.82 = 353,000.66 : x
  2. Step 2: Convert to fraction form
    639,486.74/882,497.82 = 353,000.66/x
  3. Step 3: Cross multiply
    639,486.74x = 882,497.82 × 353,000.66
  4. Step 4: Simplify right side
    639,486.74x = 311,522,312,908.56
  5. Step 5: Solve for x
    x = 311,522,312,908.56/639,486.74
  6. Step 6: Final answer
    x = 487,144.29

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1.5x scale

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.