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Finding the Fourth Proportional to 285,788.84, 428,678.80 and 69,650.04

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Solution

The fourth proportional to 285,788.84, 428,678.80 and 69,650.04 is: 104,473.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,788.84 : 428,678.80 = 69,650.04 : x
  2. Step 2: Convert to fraction form
    285,788.84/428,678.80 = 69,650.04/x
  3. Step 3: Cross multiply
    285,788.84x = 428,678.80 × 69,650.04
  4. Step 4: Simplify right side
    285,788.84x = 29,857,495,567.15
  5. Step 5: Solve for x
    x = 29,857,495,567.15/285,788.84
  6. Step 6: Final answer
    x = 104,473.97

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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.