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Finding the Fourth Proportional to 768,695.40, 1,153,043.10 and 326,327.40

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Solution

The fourth proportional to 768,695.40, 1,153,043.10 and 326,327.40 is: 489,491.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,695.40 : 1,153,043.10 = 326,327.40 : x
  2. Step 2: Convert to fraction form
    768,695.40/1,153,043.10 = 326,327.40/x
  3. Step 3: Cross multiply
    768,695.40x = 1,153,043.10 × 326,327.40
  4. Step 4: Simplify right side
    768,695.40x = 376,269,556,910.94
  5. Step 5: Solve for x
    x = 376,269,556,910.94/768,695.40
  6. Step 6: Final answer
    x = 489,491.10

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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.