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Finding the Fourth Proportional to 389,953.60, 584,930.40 and 109,518.40

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Solution

The fourth proportional to 389,953.60, 584,930.40 and 109,518.40 is: 164,277.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,953.60 : 584,930.40 = 109,518.40 : x
  2. Step 2: Convert to fraction form
    389,953.60/584,930.40 = 109,518.40/x
  3. Step 3: Cross multiply
    389,953.60x = 584,930.40 × 109,518.40
  4. Step 4: Simplify right side
    389,953.60x = 64,060,641,519.36
  5. Step 5: Solve for x
    x = 64,060,641,519.36/389,953.60
  6. Step 6: Final answer
    x = 164,277.60

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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.