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Finding the Fourth Proportional to 768,711.20, 1,152,721.20 and 295,239.20

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Solution

The fourth proportional to 768,711.20, 1,152,721.20 and 295,239.20 is: 442,726.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,711.20 : 1,152,721.20 = 295,239.20 : x
  2. Step 2: Convert to fraction form
    768,711.20/1,152,721.20 = 295,239.20/x
  3. Step 3: Cross multiply
    768,711.20x = 1,152,721.20 × 295,239.20
  4. Step 4: Simplify right side
    768,711.20x = 340,328,484,911.04
  5. Step 5: Solve for x
    x = 340,328,484,911.04/768,711.20
  6. Step 6: Final answer
    x = 442,726.07

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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.