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Finding the Fourth Proportional to 487,508.09, 731,435.33 and 217,611.77

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Solution

The fourth proportional to 487,508.09, 731,435.33 and 217,611.77 is: 326,494.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,508.09 : 731,435.33 = 217,611.77 : x
  2. Step 2: Convert to fraction form
    487,508.09/731,435.33 = 217,611.77/x
  3. Step 3: Cross multiply
    487,508.09x = 731,435.33 × 217,611.77
  4. Step 4: Simplify right side
    487,508.09x = 159,168,933,688.69
  5. Step 5: Solve for x
    x = 159,168,933,688.69/487,508.09
  6. Step 6: Final answer
    x = 326,494.96

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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.