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Finding the Fourth Proportional to 639,503.72, 882,515.29 and 353,024

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Solution

The fourth proportional to 639,503.72, 882,515.29 and 353,024 is: 487,173.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,503.72 : 882,515.29 = 353,024 : x
  2. Step 2: Convert to fraction form
    639,503.72/882,515.29 = 353,024/x
  3. Step 3: Cross multiply
    639,503.72x = 882,515.29 × 353,024
  4. Step 4: Simplify right side
    639,503.72x = 311,549,077,736.96
  5. Step 5: Solve for x
    x = 311,549,077,736.96/639,503.72
  6. Step 6: Final answer
    x = 487,173.21

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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.