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Finding the Fourth Proportional to 718,513.45, 991,503.30 and 412,374.39

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Solution

The fourth proportional to 718,513.45, 991,503.30 and 412,374.39 is: 569,050.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,513.45 : 991,503.30 = 412,374.39 : x
  2. Step 2: Convert to fraction form
    718,513.45/991,503.30 = 412,374.39/x
  3. Step 3: Cross multiply
    718,513.45x = 991,503.30 × 412,374.39
  4. Step 4: Simplify right side
    718,513.45x = 408,870,569,606.35
  5. Step 5: Solve for x
    x = 408,870,569,606.35/718,513.45
  6. Step 6: Final answer
    x = 569,050.68

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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.