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Finding the Fourth Proportional to 358,645.60, 538,039.28 and 105,930.48

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Solution

The fourth proportional to 358,645.60, 538,039.28 and 105,930.48 is: 158,916.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,645.60 : 538,039.28 = 105,930.48 : x
  2. Step 2: Convert to fraction form
    358,645.60/538,039.28 = 105,930.48/x
  3. Step 3: Cross multiply
    358,645.60x = 538,039.28 × 105,930.48
  4. Step 4: Simplify right side
    358,645.60x = 56,994,759,189.25
  5. Step 5: Solve for x
    x = 56,994,759,189.25/358,645.60
  6. Step 6: Final answer
    x = 158,916.66

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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.