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Finding the Fourth Proportional to 978,154.32, 1,467,232.38 and 787,721.70

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Solution

The fourth proportional to 978,154.32, 1,467,232.38 and 787,721.70 is: 1,181,583.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,154.32 : 1,467,232.38 = 787,721.70 : x
  2. Step 2: Convert to fraction form
    978,154.32/1,467,232.38 = 787,721.70/x
  3. Step 3: Cross multiply
    978,154.32x = 1,467,232.38 × 787,721.70
  4. Step 4: Simplify right side
    978,154.32x = 1,155,770,784,668.65
  5. Step 5: Solve for x
    x = 1,155,770,784,668.65/978,154.32
  6. Step 6: Final answer
    x = 1,181,583.27

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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.