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Finding the Fourth Proportional to 389,125.50, 536,788.92 and 316,609.45

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Solution

The fourth proportional to 389,125.50, 536,788.92 and 316,609.45 is: 436,754.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,125.50 : 536,788.92 = 316,609.45 : x
  2. Step 2: Convert to fraction form
    389,125.50/536,788.92 = 316,609.45/x
  3. Step 3: Cross multiply
    389,125.50x = 536,788.92 × 316,609.45
  4. Step 4: Simplify right side
    389,125.50x = 169,952,444,727.29
  5. Step 5: Solve for x
    x = 169,952,444,727.29/389,125.50
  6. Step 6: Final answer
    x = 436,754.84

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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.