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Finding the Fourth Proportional to 429,346.30, 644,339.40 and 163,625.80

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Solution

The fourth proportional to 429,346.30, 644,339.40 and 163,625.80 is: 245,560.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,346.30 : 644,339.40 = 163,625.80 : x
  2. Step 2: Convert to fraction form
    429,346.30/644,339.40 = 163,625.80/x
  3. Step 3: Cross multiply
    429,346.30x = 644,339.40 × 163,625.80
  4. Step 4: Simplify right side
    429,346.30x = 105,430,549,796.52
  5. Step 5: Solve for x
    x = 105,430,549,796.52/429,346.30
  6. Step 6: Final answer
    x = 245,560.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.