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Finding the Fourth Proportional to 639,850.52, 883,393.08 and 407,408.64

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Solution

The fourth proportional to 639,850.52, 883,393.08 and 407,408.64 is: 562,478.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,850.52 : 883,393.08 = 407,408.64 : x
  2. Step 2: Convert to fraction form
    639,850.52/883,393.08 = 407,408.64/x
  3. Step 3: Cross multiply
    639,850.52x = 883,393.08 × 407,408.64
  4. Step 4: Simplify right side
    639,850.52x = 359,901,973,308.21
  5. Step 5: Solve for x
    x = 359,901,973,308.21/639,850.52
  6. Step 6: Final answer
    x = 562,478.21

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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.