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Finding the Fourth Proportional to 978,763.60, 1,468,145.40 and 876,120.40

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Solution

The fourth proportional to 978,763.60, 1,468,145.40 and 876,120.40 is: 1,314,180.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,763.60 : 1,468,145.40 = 876,120.40 : x
  2. Step 2: Convert to fraction form
    978,763.60/1,468,145.40 = 876,120.40/x
  3. Step 3: Cross multiply
    978,763.60x = 1,468,145.40 × 876,120.40
  4. Step 4: Simplify right side
    978,763.60x = 1,286,272,135,106.16
  5. Step 5: Solve for x
    x = 1,286,272,135,106.16/978,763.60
  6. Step 6: Final answer
    x = 1,314,180.60

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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.