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Finding the Fourth Proportional to 429,775.22, 643,776.89 and 251,742.48

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Solution

The fourth proportional to 429,775.22, 643,776.89 and 251,742.48 is: 377,094.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,775.22 : 643,776.89 = 251,742.48 : x
  2. Step 2: Convert to fraction form
    429,775.22/643,776.89 = 251,742.48/x
  3. Step 3: Cross multiply
    429,775.22x = 643,776.89 × 251,742.48
  4. Step 4: Simplify right side
    429,775.22x = 162,065,989,596.58
  5. Step 5: Solve for x
    x = 162,065,989,596.58/429,775.22
  6. Step 6: Final answer
    x = 377,094.78

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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.