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Finding the Fourth Proportional to 612,864.60, 919,296.90 and 192,139.80

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Solution

The fourth proportional to 612,864.60, 919,296.90 and 192,139.80 is: 288,209.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,864.60 : 919,296.90 = 192,139.80 : x
  2. Step 2: Convert to fraction form
    612,864.60/919,296.90 = 192,139.80/x
  3. Step 3: Cross multiply
    612,864.60x = 919,296.90 × 192,139.80
  4. Step 4: Simplify right side
    612,864.60x = 176,633,522,506.62
  5. Step 5: Solve for x
    x = 176,633,522,506.62/612,864.60
  6. Step 6: Final answer
    x = 288,209.70

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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.