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Finding the Fourth Proportional to 429,117.60, 643,676.40 and 272,042.40

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Solution

The fourth proportional to 429,117.60, 643,676.40 and 272,042.40 is: 408,063.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,117.60 : 643,676.40 = 272,042.40 : x
  2. Step 2: Convert to fraction form
    429,117.60/643,676.40 = 272,042.40/x
  3. Step 3: Cross multiply
    429,117.60x = 643,676.40 × 272,042.40
  4. Step 4: Simplify right side
    429,117.60x = 175,107,272,679.36
  5. Step 5: Solve for x
    x = 175,107,272,679.36/429,117.60
  6. Step 6: Final answer
    x = 408,063.60

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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.